diff --git a/MEMORY.md b/MEMORY.md
index 3e78551..cd80ec0 100644
--- a/MEMORY.md
+++ b/MEMORY.md
@@ -40,5 +40,9 @@ This project (`product_inventory`) integrates Google Sheets with Shopify. It ser
         1. Sanitize with `Utilities.newBlob()`.
         2. Fallback to **Advanced Drive Service** (`Drive.Files.create` / `v3`) if standard creation fails.
 - **Video Previews**:
-    - HTML5 `<video>` tags often fail with standard Drive download URLs due to auth/codec issues.
-    - **Strategy**: Use an `<iframe>` embedding the `https://drive.google.com/file/d/{ID}/preview` URL. This leverages Google's native player for reliable auth and transcoding.
+- **Video Previews**:
+    - Use `document.createElement('video')` to inject video tags. Avoid template strings (`<video src="...">`) as the parser sanitizes them aggressively.
+    - Fallback to `<iframe>` only if native playback fails.
+- **Client-Side Syntax**:
+    - **ES5 ONLY**: Do not use `class` in client-side HTML files. The Apps Script sanitizer often fails to parse them. Use `function` constructors.
+
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 79b156f..88ebe06 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -141,3 +141,19 @@ We implemented a "Sidebar-First" architecture for product media to handle the co
     - Calculates checksums to avoid re-uploading duplicate images.
     - Uses Shopify's "Staged Uploads" -> "Create Media" mutation flow.
 
+### 8. Apps Script & HTML Service Constraints
+
+When working with `HtmlService` (client-side code), the environment differs significantly from the server-side V8 runtime.
+
+1.  **Server-Side (`.ts`/`.gs`)**:
+    -   **Runtime**: V8 Engine.
+    -   **Syntax**: Modern ES6+ (Classes, Arrow Functions, `const`/`let`) is fully supported.
+    -   **Recommendation**: Use standard TypeScript patterns.
+
+2.  **Client-Side (`.html` served via `createHtmlOutputFromFile`)**:
+    -   **Runtime**: Legacy Browser Environment / Strict Caja Sanitization.
+    -   **Constraint**: The parser often chokes on ES6 `class` syntax and complex template strings inside HTML attributes.
+    -   **Rule 1**: **NO ES6 CLASSES**. Use ES5 `function` constructors and `prototype` methods.
+    -   **Rule 2**: **NO Complex Template Strings in Attributes**. Do not use `src="${var}"` if the variable contains a URL. Use `document.createElement` and set properties (e.g., `element.src = value`) programmatically.
+    -   **Rule 3**: **Unified Script Tags**. Consolidate scripts into a single block where possible to avoid parser merge errors.
+    -   **Rule 4**: **Var over Let/Const**. Top-level variables should use `var` or explicit `window` assignment to ensure they are accessible to inline HTML handlers (e.g., `onclick="handler()"`).
diff --git a/src/MediaManager.html b/src/MediaManager.html
index 12009ee..2de00a6 100644
--- a/src/MediaManager.html
+++ b/src/MediaManager.html
@@ -86,7 +86,8 @@
       grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
       gap: 12px;
       margin-top: 16px;
-      min-height: 100px; /* Drop target area */
+      min-height: 100px;
+      /* Drop target area */
     }
 
     .media-item {
@@ -101,7 +102,7 @@
     }
 
     .media-item:active {
-        cursor: grabbing;
+      cursor: grabbing;
     }
 
     .media-item.sortable-ghost {
@@ -118,8 +119,8 @@
     }
 
     .media-item.deleted-item {
-        opacity: 0.5;
-        filter: grayscale(100%);
+      opacity: 0.5;
+      filter: grayscale(100%);
     }
 
     /* Media Content */
@@ -127,7 +128,8 @@
       width: 100%;
       height: 100%;
       object-fit: contain;
-      background: #f8fafc; /* Placeholder bg */
+      background: #f8fafc;
+      /* Placeholder bg */
       padding: 4px;
       box-sizing: border-box;
     }
@@ -135,37 +137,61 @@
     /* Overlays & Badges */
     .media-overlay {
       position: absolute;
-      top: 0;
+      top: auto;
       left: 0;
       right: 0;
       bottom: 0;
-      background: rgba(0,0,0,0.4);
+      background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 100%);
       opacity: 0;
       transition: opacity 0.2s;
       display: flex;
-      align-items: center;
+      align-items: flex-end;
       justify-content: center;
       gap: 8px;
+      padding: 40px 10px 10px 10px;
+      pointer-events: none;
+    }
+
+    .media-overlay .icon-btn {
+      pointer-events: auto;
     }
 
     .media-item:hover .media-overlay {
       opacity: 1;
     }
 
+    .type-badge {
+      position: absolute;
+      top: 6px;
+      left: 6px;
+      z-index: 10;
+      background: rgba(0, 0, 0, 0.5);
+      color: white;
+      border-radius: 4px;
+      padding: 4px;
+      font-size: 14px;
+      line-height: 1;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      box-shadow: 0 1px 2px rgb(0 0 0 / 0.1);
+    }
+
     .badge {
-        position: absolute;
-        top: 6px;
-        right: 6px;
-        font-size: 10px; /* Text badge */
-        z-index: 10;
-        padding: 2px 6px;
-        border-radius: 4px;
-        display: flex;
-        align-items: center;
-        justify-content: center;
-        box-shadow: 0 1px 2px rgb(0 0 0 / 0.1);
-        font-weight: 600;
-        text-transform: uppercase;
+      position: absolute;
+      top: 6px;
+      right: 6px;
+      font-size: 10px;
+      /* Text badge */
+      z-index: 10;
+      padding: 2px 6px;
+      border-radius: 4px;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      box-shadow: 0 1px 2px rgb(0 0 0 / 0.1);
+      font-weight: 600;
+      text-transform: uppercase;
     }
 
     .icon-btn {
@@ -183,11 +209,16 @@
     }
 
     .icon-btn:hover {
-        transform: scale(1.1);
+      transform: scale(1.1);
     }
 
-    .btn-delete { color: var(--danger); }
-    .btn-view { color: var(--primary); }
+    .btn-delete {
+      color: var(--danger);
+    }
+
+    .btn-view {
+      color: var(--primary);
+    }
 
     /* Buttons */
     .btn {
@@ -212,9 +243,9 @@
     }
 
     .btn:disabled {
-        background-color: var(--text-secondary);
-        cursor: not-allowed;
-        opacity: 0.7;
+      background-color: var(--text-secondary);
+      cursor: not-allowed;
+      opacity: 0.7;
     }
 
     .btn-secondary {
@@ -228,45 +259,48 @@
     }
 
     .action-bar {
-        position: sticky;
-        bottom: 0;
-        background: var(--surface);
-        padding: 16px;
-        border-top: 1px solid var(--border);
-        margin: 0 -16px -16px -16px;
-        border-bottom-left-radius: 12px;
-        border-bottom-right-radius: 12px;
-        display: flex;
-        gap: 8px;
+      position: sticky;
+      bottom: 0;
+      background: var(--surface);
+      padding: 16px;
+      border-top: 1px solid var(--border);
+      margin: 0 -16px -16px -16px;
+      border-bottom-left-radius: 12px;
+      border-bottom-right-radius: 12px;
+      display: flex;
+      gap: 8px;
     }
 
     /* Modal */
     .modal-overlay {
-        position: fixed;
-        top: 0; left: 0; right: 0; bottom: 0;
-        background: rgba(0,0,0,0.8);
-        z-index: 100;
-        display: none;
-        align-items: center;
-        justify-content: center;
-        padding: 20px;
+      position: fixed;
+      top: 0;
+      left: 0;
+      right: 0;
+      bottom: 0;
+      background: rgba(0, 0, 0, 0.8);
+      z-index: 100;
+      display: none;
+      align-items: center;
+      justify-content: center;
+      padding: 20px;
     }
 
     .modal-content {
-        max-width: 90%;
-        max-height: 90%;
-        position: relative;
+      max-width: 90%;
+      max-height: 90%;
+      position: relative;
     }
 
     .modal-close {
-        position: absolute;
-        top: -40px;
-        right: 0;
-        color: white;
-        background: none;
-        border: none;
-        font-size: 24px;
-        cursor: pointer;
+      position: absolute;
+      top: -40px;
+      right: 0;
+      color: white;
+      background: none;
+      border: none;
+      font-size: 24px;
+      cursor: pointer;
     }
 
     /* Empty State */
@@ -288,30 +322,49 @@
       animation: spin 1s linear infinite;
     }
 
-    @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
+    @keyframes spin {
+      0% {
+        transform: rotate(0deg);
+      }
+
+      100% {
+        transform: rotate(360deg);
+      }
+    }
 
     /* Session UI */
-     #photos-session-ui {
-        animation: slideDown 0.3s ease-out;
-     }
-     @keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
+    #photos-session-ui {
+      animation: slideDown 0.3s ease-out;
+    }
 
+    @keyframes slideDown {
+      from {
+        opacity: 0;
+        transform: translateY(-10px);
+      }
+
+      to {
+        opacity: 1;
+        transform: translateY(0);
+      }
+    }
   </style>
 </head>
 
 <body>
   <div id="main-ui" style="display:none">
-<!-- Header Card -->
+    <!-- Header Card -->
     <!-- Product Info Card -->
     <div class="card">
-        <div style="display:flex; justify-content:space-between; align-items:flex-start;">
-          <div>
-            <div id="current-title" style="font-weight:600; font-size:16px; margin-bottom:4px; color:var(--text);">Loading...
-            </div>
-            <span id="current-sku" class="sku-badge">...</span>
+      <div style="display:flex; justify-content:space-between; align-items:flex-start;">
+        <div>
+          <div id="current-title" style="font-weight:600; font-size:16px; margin-bottom:4px; color:var(--text);">
+            Loading...
+          </div>
+          <span id="current-sku" class="sku-badge">...</span>
+          </div>
+          <!-- Optional: Could put metadata here or small status -->
           </div>
-            <!-- Optional: Could put metadata here or small status -->
-        </div>
     </div>
 
     <!-- Upload Options Card -->
@@ -324,74 +377,74 @@
           style="flex: 1; font-size: 13px; white-space: nowrap;">
           Google Drive
         </button>
-          <button onclick="controller.startPhotoSession()" class="btn btn-secondary"
-            style="flex: 1; font-size: 13px; white-space: nowrap;">
-            Google Photos
-          </button>
-          <button onclick="document.getElementById('file-input').click()" class="btn btn-secondary"
-            style="flex: 1; font-size: 13px;">
-            Your Computer
-          </button>
-          </div>
-          <input type="file" id="file-input" multiple style="display:none" onchange="controller.handleFiles(this.files)">
+        <button onclick="controller.startPhotoSession()" class="btn btn-secondary"
+          style="flex: 1; font-size: 13px; white-space: nowrap;">
+          Google Photos
+        </button>
+        <button onclick="document.getElementById('file-input').click()" class="btn btn-secondary"
+          style="flex: 1; font-size: 13px;">
+          Your Computer
+        </button>
+        </div>
+        <input type="file" id="file-input" multiple style="display:none" onchange="controller.handleFiles(this.files)">
     </div>
 
-      <!-- Photos Session UI -->
-      <div id="photos-session-ui"
-        style="display:none; margin-top:12px; padding:12px; background:#f0f9ff; border-radius:8px; border:1px solid #bae6fd;">
-        <div style="display:flex; justify-content:space-between; align-items:center; margin-bottom:4px;">
-          <span style="font-weight:600; font-size:12px; color:#0369a1;">Photo Picker Session</span>
-          <button onclick="ui.closePhotoSession()"
-            style="background:none; border:none; color:#0369a1; cursor:pointer; font-size:16px;">×</button>
-        </div>
-        <a id="photos-session-link" href="#" target="_blank" class="btn"
-          style="background:#0ea5e9; text-decoration:none; margin-bottom:8px;">
-          Open Google Photos ↗
-        </a>
-        <div id="photos-session-status" style="font-size:11px; color:#64748b; text-align:center;">Initializing...</div>
-        </div>
-        </div>
+    <!-- Photos Session UI -->
+    <div id="photos-session-ui"
+      style="display:none; margin-top:12px; padding:12px; background:#f0f9ff; border-radius:8px; border:1px solid #bae6fd;">
+      <div style="display:flex; justify-content:space-between; align-items:center; margin-bottom:4px;">
+        <span style="font-weight:600; font-size:12px; color:#0369a1;">Photo Picker Session</span>
+        <button onclick="ui.closePhotoSession()"
+          style="background:none; border:none; color:#0369a1; cursor:pointer; font-size:16px;">×</button>
+      </div>
+      <a id="photos-session-link" href="#" target="_blank" class="btn"
+        style="background:#0ea5e9; text-decoration:none; margin-bottom:8px;">
+        Open Google Photos ↗
+      </a>
+      <div id="photos-session-status" style="font-size:11px; color:#64748b; text-align:center;">Initializing...</div>
+    </div>
+    </div>
 
-        <div class="card" style="padding-bottom: 0;">
-          <div class="header" style="margin-bottom:8px; display:flex; justify-content:space-between; align-items:center;">
-            <div style="display:flex; align-items:baseline; gap:12px;">
-              <h2 style="margin:0;">Gallery <span id="item-count"
-                  style="font-weight:400; color:var(--text-secondary); font-size:12px;">(0)</span></h2>
-              <div id="quick-links" style="font-size:12px; display:flex; gap:8px;"></div>
-            </div>
-            <div style="display: flex; gap: 8px;">
-              <button id="toggle-log-btn" onclick="ui.toggleLog()"
-                style="display:none; background:none; border:none; cursor:pointer; font-size:12px; color:var(--primary);">View
-                Log</button>
-              <button onclick="controller.loadMedia()" title="Refresh"
-                style="background:none; border:none; cursor:pointer; font-size:18px; color:var(--text-secondary);">↻</button>
-            </div>
-          </div>
+  <div class="card" style="padding-bottom: 0;">
+    <div class="header" style="margin-bottom:8px; display:flex; justify-content:space-between; align-items:center;">
+      <div style="display:flex; align-items:baseline; gap:12px;">
+        <h2 style="margin:0;">Gallery <span id="item-count"
+            style="font-weight:400; color:var(--text-secondary); font-size:12px;">(0)</span></h2>
+        <div id="quick-links" style="font-size:12px; display:flex; gap:8px;"></div>
+      </div>
+      <div style="display: flex; gap: 8px;">
+        <button id="toggle-log-btn" onclick="ui.toggleLog()"
+          style="display:none; background:none; border:none; cursor:pointer; font-size:12px; color:var(--primary);">View
+          Log</button>
+        <button onclick="controller.loadMedia()" title="Refresh"
+          style="background:none; border:none; cursor:pointer; font-size:18px; color:var(--text-secondary);">↻</button>
+      </div>
+    </div>
 
-        <!-- Status Log -->
-        <div id="status-log-container"
-          style="padding:16px; background:#f8fafc; border-bottom:1px solid var(--border); font-family:monospace; font-size:12px; line-height:1.6; display:none;">
-        </div>
+    <!-- Status Log -->
+    <div id="status-log-container"
+      style="padding:16px; background:#f8fafc; border-bottom:1px solid var(--border); font-family:monospace; font-size:12px; line-height:1.6; display:none;">
+    </div>
 
-      <div id="media-grid" class="media-grid">
-        <!-- Rendered Items -->
-        </div>
-<!-- Action Footer -->
-<div class="action-bar" style="display:flex; gap:8px;">
-  <button id="details-btn" onclick="ui.showDetails()" class="btn btn-secondary" style="flex:1;">
-    Show Plan
-  </button>
-  <button id="save-btn" onclick="controller.saveChanges()" class="btn" style="flex:2;" disabled>
-    Save Changes
-  </button>
-</div>
-</div>
-</div>
+    <div id="media-grid" class="media-grid">
+      <!-- Rendered Items -->
+    </div>
+    <!-- Action Footer -->
+    <div class="action-bar" style="display:flex; gap:8px;">
+      <button id="details-btn" onclick="ui.showDetails()" class="btn btn-secondary" style="flex:1;">
+        Show Plan
+      </button>
+      <button id="save-btn" onclick="controller.saveChanges()" class="btn" style="flex:2;" disabled>
+        Save Changes
+      </button>
+    </div>
+    </div>
+    </div>
 
-<!-- Loading Screen -->
-<div id="loading-ui" style="text-align:center; padding-top: 100px;">
-  <div class="spinner" style="width: 32px; height: 32px; border-width: 3px;"></div>
-  <div style="margin-top:16px; color: var(--text-secondary); font-weight: 500;">Connecting...</div>
+  <!-- Loading Screen -->
+  <div id="loading-ui" style="text-align:center; padding-top: 100px;">
+    <div class="spinner" style="width: 32px; height: 32px; border-width: 3px;"></div>
+    <div style="margin-top:16px; color: var(--text-secondary); font-weight: 500;">Connecting...</div>
   </div>
 
   <!-- Preview Modal -->
@@ -423,384 +476,395 @@
 
   <div id="drop-overlay"
     style="position: fixed; top:0; left:0; right:0; bottom:0; background: rgba(37, 99, 235, 0.9); z-index: 200; display: none; flex-direction: column; align-items: center; justify-content: center; color: white;">
-    <div style="font-size: 48px; margin-bottom: 16px;">☁️</div>
+      <div style="font-size: 48px; margin-bottom: 16px;">☁️</div>
     <div style="font-size: 24px; font-weight: 600;">Drop files to Upload</div>
   </div>
 
   <script>
     /**
-     * State Management
+     * State Management & Error Handling
      */
-    class MediaState {
-      constructor() {
-        this.sku = null;
-        this.items = []; // Current UI State
-        this.initialState = []; // For diffing "isDirty"
-      }
+        window.onerror = function (msg, url, line) {
+          alert("Script Error: " + msg + "\nLine: " + line);
+        };
 
-      setSku(info) {
+        // --- ES5 Refactor: MediaState ---
+        function MediaState() {
+          this.sku = null;
+      this.token = null;
+      this.items = [];
+      this.initialState = [];
+    }
+
+      MediaState.prototype.setSku = function (info) {
         this.sku = info ? info.sku : null;
         this.title = info ? info.title : "";
         this.items = [];
         this.initialState = [];
         ui.updateSku(this.sku, this.title);
-      }
+    };
 
-      setItems(items) {
-        // items: { id, filename, thumbnail, status, source }
+      MediaState.prototype.setItems = function (items) {
         this.items = items || [];
-        this.initialState = JSON.parse(JSON.stringify(this.items)); // Deep copy
+      this.initialState = JSON.parse(JSON.stringify(this.items));
         ui.render(this.items);
         this.checkDirty();
-      }
+    };
 
-      addItem(item) {
+      MediaState.prototype.addItem = function (item) {
         this.items.push(item);
         ui.render(this.items);
         this.checkDirty();
-      }
+    };
 
-      deleteItem(index) {
-        const item = this.items[index];
-        if (item.source === 'new') {
-          // Remove entirely if it's a new upload not yet synced
+      MediaState.prototype.deleteItem = function (index) {
+        var item = this.items[index];
+      if (item.source === 'new') {
           this.items.splice(index, 1);
         } else {
-          // Toggle soft delete for existing items
           item._deleted = !item._deleted;
         }
         ui.render(this.items);
         this.checkDirty();
-      }
+    };
 
-      reorderItems(newIndices) {
-        // Handled by Sortable onEnd
-      }
+      MediaState.prototype.reorderItems = function (newIndices) {
+        // Handled by Sortable
+      };
 
-      // Check if current state differs from initial
-      checkDirty() {
-        const plan = this.calculateDiff();
-        const isDirty = plan.hasChanges;
+      MediaState.prototype.checkDirty = function () {
+        var plan = this.calculateDiff();
+        var isDirty = plan.hasChanges;
         ui.toggleSave(isDirty);
         return plan;
-      }
+    };
 
-      calculateDiff() {
-        const currentIds = new Set(this.items.map(i => i.id));
-        const initialIds = new Set(this.initialState.map(i => i.id));
+      MediaState.prototype.calculateDiff = function () {
+        var currentIds = new Set(this.items.map(function (i) { return i.id; }));
+        var initialIds = new Set(this.initialState.map(function (i) { return i.id; }));
 
-        const actions = [];
+      var actions = [];
 
-        // 1. Deletions (Marked _deleted)
-        this.items.forEach(i => {
-          if (i._deleted) {
-            actions.push({ type: 'delete', name: i.filename || 'Item' });
-          }
+      this.items.forEach(function (i) {
+        if (i._deleted) actions.push({ type: 'delete', name: i.filename || 'Item' });
         });
 
-        // 2. Additions
-        this.items.forEach(i => {
-          if (i._deleted) return; // Skip deleted items
-
-          if (!initialIds.has(i.id)) {
-            actions.push({ type: 'upload', name: i.filename || 'New Item' });
-          } else if (i.status === 'drive_only') {
-            // Existing drive items to be synced
-            actions.push({ type: 'sync_upload', name: i.filename || 'Item' });
-          }
+      this.items.forEach(function (i) {
+        if (i._deleted) return;
+        if (!initialIds.has(i.id)) {
+          actions.push({ type: 'upload', name: i.filename || 'New Item' });
+        } else if (i.status === 'drive_only') {
+              actions.push({ type: 'sync_upload', name: i.filename || 'Item' });
+            }
         });
 
-        // 3. Reorders
-        const activeItems = this.items.filter(i => !i._deleted);
+      // 3. Reorders
+      var activeItems = this.items.filter(function (i) { return !i._deleted; });
+      // Filter initial state to only items that are still active
+      var initialCommon = this.initialState.filter(function (i) {
+        return activeItems.some(function (c) { return c.id === i.id; });
+      });
+      var currentCommon = activeItems.filter(function (i) {
+        return initialIds.has(i.id);
+      });
 
-        // Check order of common items
-        // Filter initial state to only items that are still active
-        const initialCommon = this.initialState.filter(i => activeItems.find(c => c.id === i.id));
-        const currentCommon = activeItems.filter(i => initialIds.has(i.id));
-
-        let orderChanged = false;
-        if (initialCommon.length !== currentCommon.length) {
-          // Should match if we filtered correctly
-        } else {
-          for (let k = 0; k < initialCommon.length; k++) {
+      var orderChanged = false;
+      if (initialCommon.length === currentCommon.length) {
+        for (var k = 0; k < initialCommon.length; k++) {
             if (initialCommon[k].id !== currentCommon[k].id) {
               orderChanged = true;
               break;
             }
           }
+        } else {
+          // If lengths differ despite logic, assume change or weird state
         }
 
         if (orderChanged) {
           actions.push({ type: 'reorder', name: 'Reorder Gallery' });
         }
 
-        const uniqueActions = actions.filter((v, i, a) => a.findIndex(t => (t.type === v.type && t.name === v.name)) === i);
+      var uniqueActions = actions.filter(function (v, i, a) {
+        return a.findIndex(function (t) { return t.type === v.type && t.name === v.name; }) === i;
+      });
 
         return {
           hasChanges: uniqueActions.length > 0,
           actions: uniqueActions
         };
+    };
+
+      MediaState.prototype.hasNewItems = function () {
+        return this.items.some(function (i) {
+          return !i._deleted && (i.status === 'drive_only' || i.source === 'new');
+        });
+      };
+
+      var state = new MediaState();
+      window.state = state;
+
+      // --- ES5 Refactor: UI ---
+      function UI() {
+        this.grid = document.getElementById('media-grid');
+        this.saveBtn = document.getElementById('save-btn');
+        this.toggleLogBtn = document.getElementById('toggle-log-btn');
+        this.logContainer = document.getElementById('status-log-container');
+        this.linksContainer = document.getElementById('quick-links');
+        this.sortable = null;
+        this.driveUrl = null;
+        this.shopifyUrl = null;
       }
 
-      hasNewItems() {
-        return this.items.some(i => !i._deleted && (i.status === 'drive_only' || i.source === 'new'));
-      }
-    }
+      UI.prototype.setDriveLink = function (url) { this.driveUrl = url; this.renderLinks(); };
+      UI.prototype.setShopifyLink = function (url) { this.shopifyUrl = url; this.renderLinks(); };
 
-                const state = new MediaState();
+      UI.prototype.renderLinks = function () {
+        this.linksContainer.innerHTML = '';
+      if (this.driveUrl) this.linksContainer.innerHTML += '<a href="' + this.driveUrl + '" target="_blank" style="color:var(--primary); text-decoration:none;">Drive ↗</a>';
+      if (this.shopifyUrl) this.linksContainer.innerHTML += '<a href="' + this.shopifyUrl + '" target="_blank" style="color:var(--primary); text-decoration:none; margin-left:8px;">Shopify ↗</a>';
+    };
 
-                /**
-                 * UI Controller
-                 */
-                class UI {
-                  constructor() {
-                    this.grid = document.getElementById('media-grid');
-                    this.saveBtn = document.getElementById('save-btn');
-                    this.toggleLogBtn = document.getElementById('toggle-log-btn');
-                    this.logContainer = document.getElementById('status-log-container');
-                    this.linksContainer = document.getElementById('quick-links');
-                    this.sortable = null;
-                    this.driveUrl = null;
-                    this.shopifyUrl = null;
-                  }
+      UI.prototype.toggleLog = function (forceState) {
+        var isVisible = typeof forceState === 'boolean' ? !forceState : this.logContainer.style.display !== 'none';
+        this.logContainer.style.display = isVisible ? 'none' : 'block';
+        this.toggleLogBtn.innerText = isVisible ? "View Log" : "Hide Log";
+    };
 
-                setDriveLink(url) { this.driveUrl = url; this.renderLinks(); }
-                setShopifyLink(url) { this.shopifyUrl = url; this.renderLinks(); }
+      UI.prototype.updateSku = function (sku, title) {
+        document.getElementById('current-sku').innerText = sku || '...';
+        document.getElementById('current-title').innerText = title || '';
+        document.getElementById('loading-ui').style.display = 'none';
+        document.getElementById('main-ui').style.display = 'block';
+    };
 
-                renderLinks() {
-                  this.linksContainer.innerHTML = '';
-                  if (this.driveUrl) this.linksContainer.innerHTML += `<a href="${this.driveUrl}" target="_blank" style="color:var(--primary); text-decoration:none;">Drive ↗</a>`;
-                  if (this.shopifyUrl) this.linksContainer.innerHTML += `<a href="${this.shopifyUrl}" target="_blank" style="color:var(--primary); text-decoration:none; margin-left:8px;">Shopify ↗</a>`;
-                }
+      UI.prototype.toggleSave = function (enable) {
+        this.saveBtn.disabled = !enable;
+        this.saveBtn.innerText = enable ? "Save Changes" : "No Changes";
+    };
 
-                toggleLog(forceState) {
-                  const isVisible = typeof forceState === 'boolean' ? !forceState : this.logContainer.style.display !== 'none';
-                  this.logContainer.style.display = isVisible ? 'none' : 'block';
-                  this.toggleLogBtn.innerText = isVisible ? "View Log" : "Hide Log";
-              }
+      UI.prototype.render = function (items) {
+        this.grid.innerHTML = '';
+      var _this = this; // Capture 'this' for callbacks
+      var activeCount = items.filter(function (i) { return !i._deleted; }).length;
+      document.getElementById('item-count').innerText = '(' + activeCount + ')';
 
-                  updateSku(sku, title) {
-                    document.getElementById('current-sku').innerText = sku || '...';
-                    document.getElementById('current-title').innerText = title || '';
-                  document.getElementById('loading-ui').style.display = 'none';
-                  document.getElementById('main-ui').style.display = 'block';
-              }
-
-                toggleSave(enable) {
-                  this.saveBtn.disabled = !enable;
-                  this.saveBtn.innerText = enable ? "Save Changes" : "No Changes";
-                }
-
-                render(items) {
-                  this.grid.innerHTML = '';
-                  const activeCount = items.filter(i => !i._deleted).length;
-                  document.getElementById('item-count').innerText = `(${activeCount})`;
-
-                if (items.length === 0) {
-                  this.grid.innerHTML = '<div class="empty-state">No media found. Upload something!</div>';
-                  return;
-                }
-
-                items.forEach((item, index) => {
-                  const el = this.createCard(item, index);
-                  this.grid.appendChild(el);
-                });
-
-                // Re-init Sortable
-                if (this.sortable) this.sortable.destroy();
-                this.sortable = new Sortable(this.grid, {
-                  animation: 150,
-                  filter: '.deleted-item',
-                  ghostClass: 'sortable-ghost',
-                  dragClass: 'sortable-drag',
-                  onEnd: () => {
-                    // Update State Order
-                    const newOrderIds = Array.from(this.grid.children).map(el => el.dataset.id);
-                    // Reorder state.items based on newOrderIds
-                    const newItems = newOrderIds.map(id => state.items.find(i => i.id === id)).filter(Boolean);
-                    state.items = newItems;
-                    state.checkDirty();
-                  }
-                });
-              }
-
-                  setLoadingState(isLoading) {
-                    if (isLoading) {
-                      this.grid.innerHTML = `
-                        <div style="grid-column: 1 / -1; text-align: center; padding: 40px; color: var(--text-secondary);">
-                            <div class="spinner" style="margin-bottom: 12px;"></div>
-                            <div>Connecting to systems...</div>
-                        </div>
-                      `;
-                    }
-                  }
-
-                logStatus(step, message, type = 'info') {
-                  const container = this.logContainer;
-                  const icon = type === 'success' ? '✅' : type === 'error' ? '❌' : '⏳';
-                  const el = document.createElement('div');
-                  el.innerHTML = `<span style="margin-right:8px;">${icon}</span> ${message}`;
-                  if (type === 'error') el.style.color = 'var(--error)';
-                  container.appendChild(el);
-                }
-
-                createCard(item, index) {
-                  const div = document.createElement('div');
-                  div.className = `media-item ${item._deleted ? 'deleted-item' : ''}`;
-                  div.dataset.id = item.id;
-
-                  // Badge logic
-                  let badge = '';
-                  if (!item._deleted) {
-                    if (item.status === 'synced') badge = '<span class="badge" title="Synced" style="background:#dcfce7; color:#166534;">Synced</span>';
-                    else if (item.status === 'drive_only') badge = '<span class="badge" title="Drive Only" style="background:#dbeafe; color:#1e40af;">Drive</span>';
-                    else if (item.status === 'shopify_only') badge = '<span class="badge" title="Shopify Only" style="background:#fce7f3; color:#9d174d;">Shopify</span>';
-                  } else {
-                    badge = '<span class="badge" style="background:#fee2e2; color:#991b1b;">Deleted</span>';
-                  }
-
-                // Thumbnail
-                  const isVideo = (item.mimeType && item.mimeType.startsWith('video/')) || (item.filename && item.filename.toLowerCase().endsWith('.mp4'));
-                  if (isVideo) console.log("[MediaManager] Video Detected: " + item.filename + ", ContentUrl: " + item.contentUrl);
-                const mediaHtml = isVideo
-                  ? `<video src="${item.contentUrl || ''}" poster="${item.thumbnail}" muted loop onmouseover="this.play()" onmouseout="this.pause()" class="media-content"></video>`
-                  : `<img src="${item.thumbnail}" class="media-content" loading="lazy">`;
-
-                const actionBtn = item._deleted
-                  ? `<button class="icon-btn" onclick="state.deleteItem(${index})" title="Restore">↩️</button>`
-                  : `<button class="icon-btn btn-delete" onclick="state.deleteItem(${index})" title="Delete">🗑️</button>`;
-
-                div.innerHTML = `
-            ${badge}
-            ${mediaHtml}
-            <div class="media-overlay">
-                <button class="icon-btn btn-view" onclick="ui.openPreview('${item.id}')" title="View">👁️</button>
-                ${actionBtn}
-            </div>
-        `;
-                return div;
-              }
-
-                openPreview(id) {
-                  const item = state.items.find(i => i.id === id);
-                  if (!item) return;
-
-                const modal = document.getElementById('preview-modal');
-                const img = document.getElementById('preview-image');
-                const vid = document.getElementById('preview-video');
-                  const iframe = document.getElementById('preview-iframe');
-
-                img.style.display = 'none';
-                vid.style.display = 'none';
-                  iframe.style.display = 'none';
-                  iframe.src = 'about:blank'; // Reset
-
-                  const isVideo = (item.mimeType && item.mimeType.startsWith('video/')) || (item.filename && item.filename.toLowerCase().endsWith('.mp4'));
-
-                  if (isVideo) {
-                    // Use Drive Preview Embed URL
-                    // Note: This assumes item.id corresponds to Drive File ID for drive items.
-                    // (Which is true for 'drive_only' and 'synced' items in MediaService)
-                    let previewUrl = "https://drive.google.com/file/d/" + item.id + "/preview";
-
-                    // If it's a shopify-only video (orphan), we might need a different strategy,
-                    // but for now focusing on Drive fix.
-                    if (item.source === 'shopify_only') {
-                      // Fallback to video tag for Shopify hosted media if link is direct
-                      console.log("[MediaManager] Shopify Video: " + item.filename);
-                      vid.src = item.contentUrl || item.thumbnail; // Shopify videos usually don't have this set nicely in current logic?
-                      // Actually MediaService for orphans puts originalSrc in thumbnail.
-                      // But originalSrc for video is usually an image.
-                      // We'll leave Shopify video handling as-is (likely broken/unsupported for now) or fallback.
-                      // Effectively this branch executes the OLD logic for non-drive.
-                      vid.src = item.thumbnail; // Risk
-                      vid.style.display = 'block';
-                    } else {
-                       console.log("[MediaManager] Opening Drive Embed: " + item.filename + ", URL: " + previewUrl);
-                       iframe.src = previewUrl;
-                       iframe.style.display = 'block';
-                     }
-
-                   } else {
-                     // Image
-                     img.src = item.thumbnail; // Thumbnail is base64 for Drive, URL for Shopify
-                     // For high-res Drive image, we might want 'contentUrl' if it works, or just thumbnail.
-                     // Thumbnail is usually enough for preview or we need a proper high-res fetch.
-                     // Let's stick to thumbnail (base64) for speed/reliability unless contentUrl is proven.
-                  img.style.display = 'block';
-                }
-
-                  modal.style.display = 'flex';
-                }
-
-                closeModal(e) {
-                  if (e && e.target !== document.getElementById('preview-modal') && e.target !== document.querySelector('.modal-close')) return;
-                  document.getElementById('preview-modal').style.display = 'none';
-                  document.getElementById('preview-video').pause();
-                  document.getElementById('preview-iframe').src = 'about:blank'; // Stop playback
-                }
-
-                // --- Details Modal ---
-                showDetails() {
-                  const plan = state.calculateDiff();
-                  const container = document.getElementById('details-content');
-
-                  if (plan.actions.length === 0) {
-                    container.innerHTML = '<div style="text-align:center; padding:20px;">No pending changes.</div>';
-                  } else {
-                  const html = plan.actions.map((a, i) => {
-                    let icon = '•';
-                    if (a.type === 'delete') icon = '🗑️';
-                    if (a.type === 'upload') icon = '📤';
-                    if (a.type === 'sync_upload') icon = '☁️';
-                    if (a.type === 'reorder') icon = '🔢';
-
-                    let label = "";
-                    if (a.type === 'delete') label = `Delete <b>${a.name}</b>`;
-                    if (a.type === 'upload') label = `Upload New <b>${a.name}</b>`;
-                    if (a.type === 'sync_upload') label = `Sync Drive File <b>${a.name}</b>`;
-                    if (a.type === 'reorder') label = `Update Order`;
-
-                    return `<div style="margin-bottom:8px;">${i + 1}. ${icon} ${label}</div>`;
-                  }).join('');
-                  container.innerHTML = html;
-                }
-
-                document.getElementById('details-modal').style.display = 'flex';
-              }
-
-                closeDetails(e) {
-                  if (e && e.target !== document.getElementById('details-modal') && !e.target.matches('.modal-close, .btn-secondary, .close-btn')) return;
-                  document.getElementById('details-modal').style.display = 'none';
+      if (items.length === 0) {
+        this.grid.innerHTML = '<div class="empty-state">No media found. Upload something!</div>';
+        return;
       }
 
-                // Photos Session Methods
-                showPhotoSession(url) {
-                  const ui = document.getElementById('photos-session-ui');
-                  const link = document.getElementById('photos-session-link');
-                  const status = document.getElementById('photos-session-status');
+      items.forEach(function (item, index) {
+        var el = _this.createCard(item, index);
+        _this.grid.appendChild(el);
+      });
 
-                ui.style.display = 'block';
-                link.href = url;
-                link.style.display = 'block';
-                status.innerText = "Waiting for selection...";
-              }
+      if (this.sortable) this.sortable.destroy();
+      this.sortable = new Sortable(this.grid, {
+        animation: 150,
+        filter: '.deleted-item',
+        ghostClass: 'sortable-ghost',
+        dragClass: 'sortable-drag',
+          onEnd: function () {
+            var newOrderIds = Array.from(_this.grid.children).map(function (el) { return el.dataset.id; });
+            var newItems = newOrderIds.map(function (id) {
+              return state.items.find(function (i) { return i.id === id; });
+            }).filter(Boolean);
+            state.items = newItems;
+            state.checkDirty();
+          }
+        });
+    };
 
-                closePhotoSession() {
-                  document.getElementById('photos-session-ui').style.display = 'none';
-                }
+      UI.prototype.setLoadingState = function (isLoading) {
+        if (isLoading) {
+          this.grid.innerHTML = '<div style="grid-column: 1 / -1; text-align: center; padding: 40px; color: var(--text-secondary);">' +
+            '<div class="spinner" style="margin-bottom: 12px;"></div>' +
+            '<div>Connecting to systems...</div></div>';
+        }
+    };
 
-                updatePhotoStatus(msg) {
-                  document.getElementById('photos-session-status').innerText = msg;
-                }
-              }
+      UI.prototype.logStatus = function (step, message, type) {
+        if (!type) type = 'info';
+        var container = this.logContainer;
+        var icon = type === 'success' ? '✅' : type === 'error' ? '❌' : '⏳';
+        var el = document.createElement('div');
+        el.innerHTML = '<span style="margin-right:8px;">' + icon + '</span> ' + message;
+        if (type === 'error') el.style.color = 'var(--error)';
+        container.appendChild(el);
+    };
 
-                            const ui = new UI();
+      UI.prototype.createCard = function (item, index) {
+        var div = document.createElement('div');
+        div.className = 'media-item ' + (item._deleted ? 'deleted-item' : '');
+        div.dataset.id = item.id;
+
+      div.onmouseenter = function () {
+        var v = div.querySelector('video');
+        if (v) v.play();
+      };
+      div.onmouseleave = function () {
+        var v = div.querySelector('video');
+        if (v) v.pause();
+      };
+
+      var badge = '';
+      if (!item._deleted) {
+        if (item.status === 'synced') badge = '<span class="badge" title="Synced" style="background:#dcfce7; color:#166534;">Synced</span>';
+        else if (item.status === 'drive_only') badge = '<span class="badge" title="Drive Only" style="background:#dbeafe; color:#1e40af;">Drive</span>';
+        else if (item.status === 'shopify_only') badge = '<span class="badge" title="Shopify Only" style="background:#fce7f3; color:#9d174d;">Shopify</span>';
+      } else {
+        badge = '<span class="badge" style="background:#fee2e2; color:#991b1b;">Deleted</span>';
+      }
+
+      // Check Video
+      var isVideo = (item.mimeType && item.mimeType.startsWith('video/')) || (item.filename && item.filename.match(/\.(mp4|mov|webm)$/i));
+      if (isVideo) console.log("[MediaManager] Video Detected: " + item.filename);
+
+      var videoBadgeIcon = isVideo ? '<div class="type-badge" title="Video">📹</div>' : '';
+
+      // Content URL
+      var contentUrl = item.contentUrl || "";
+      if (isVideo && item.source !== 'shopify_only' && state.token) {
+        contentUrl = "https://www.googleapis.com/drive/v3/files/" + item.id + "?alt=media&access_token=" + state.token;
+      }
+
+      var actionBtn = item._deleted
+        ? '<button class="icon-btn" onclick="state.deleteItem(' + index + ')" title="Restore">↩️</button>'
+        : '<button class="icon-btn btn-delete" onclick="state.deleteItem(' + index + ')" title="Delete">🗑️</button>';
+
+      div.innerHTML =
+        badge +
+        videoBadgeIcon +
+        '<div class="media-overlay">' +
+        '<button class="icon-btn btn-view" onclick="ui.openPreview(\'' + item.id + '\')" title="View">👁️</button>' +
+        actionBtn +
+        '</div>';
+
+      // Create Media Element Programmatically
+      var mediaEl;
+      if (isVideo) {
+        mediaEl = document.createElement('video');
+        mediaEl.src = contentUrl;
+        mediaEl.poster = item.thumbnail || "";
+        mediaEl.muted = true;
+        mediaEl.loop = true;
+        mediaEl.style.objectFit = 'cover';
+      } else {
+        mediaEl = document.createElement('img');
+        mediaEl.src = item.thumbnail || "";
+        mediaEl.loading = "lazy";
+      }
+      mediaEl.className = 'media-content';
+
+      var overlay = div.querySelector('.media-overlay');
+      div.insertBefore(mediaEl, overlay);
+
+      return div;
+    };
+
+      UI.prototype.openPreview = function (id) {
+        var item = state.items.find(function (i) { return i.id === id; });
+        if (!item) return;
+
+      var modal = document.getElementById('preview-modal');
+      var img = document.getElementById('preview-image');
+      var vid = document.getElementById('preview-video');
+      var iframe = document.getElementById('preview-iframe');
+
+      img.style.display = 'none';
+      vid.style.display = 'none';
+      iframe.style.display = 'none';
+      iframe.src = 'about:blank';
+
+      var isVideo = (item.mimeType && item.mimeType.startsWith('video/')) || (item.filename && item.filename.match(/\.(mp4|mov|webm)$/i));
+
+      if (isVideo) {
+          var previewUrlParam = item.contentUrl || "";
+          if (item.source !== 'shopify_only' && state.token) {
+            previewUrlParam = "https://www.googleapis.com/drive/v3/files/" + item.id + "?alt=media&access_token=" + state.token;
+          }
+          if (previewUrlParam) {
+            vid.src = previewUrlParam;
+            vid.style.display = 'block';
+               vid.play().catch(console.warn);
+             } else {
+               iframe.src = "https://drive.google.com/file/d/" + item.id + "/preview";
+               iframe.style.display = 'block';
+             }
+        } else {
+          img.src = item.thumbnail;
+          img.style.display = 'block';
+        }
+
+      modal.style.display = 'flex';
+    };
+
+      UI.prototype.closeModal = function (e) {
+        if (e && e.target !== document.getElementById('preview-modal') && e.target !== document.querySelector('.modal-close')) return;
+        document.getElementById('preview-modal').style.display = 'none';
+        document.getElementById('preview-video').pause();
+      document.getElementById('preview-iframe').src = 'about:blank';
+    };
+
+      UI.prototype.showDetails = function () {
+        var plan = state.calculateDiff();
+        var container = document.getElementById('details-content');
+
+      if (plan.actions.length === 0) {
+        container.innerHTML = '<div style="text-align:center; padding:20px;">No pending changes.</div>';
+      } else {
+          var html = plan.actions.map(function (a, i) {
+            var icon = '•';
+            if (a.type === 'delete') icon = '🗑️';
+            if (a.type === 'upload') icon = '📤';
+            if (a.type === 'sync_upload') icon = '☁️';
+            if (a.type === 'reorder') icon = '🔢';
+
+              var label = "";
+              if (a.type === 'delete') label = 'Delete <b>' + a.name + '</b>';
+              if (a.type === 'upload') label = 'Upload New <b>' + a.name + '</b>';
+              if (a.type === 'sync_upload') label = 'Sync Drive File <b>' + a.name + '</b>';
+              if (a.type === 'reorder') label = 'Update Order';
+
+              return '<div style="margin-bottom:8px;">' + (i + 1) + '. ' + icon + ' ' + label + '</div>';
+            }).join('');
+          container.innerHTML = html;
+        }
+
+      document.getElementById('details-modal').style.display = 'flex';
+    };
+
+      UI.prototype.closeDetails = function (e) {
+        if (e && e.target !== document.getElementById('details-modal') && !e.target.matches('.modal-close, .btn-secondary, .close-btn')) return;
+        document.getElementById('details-modal').style.display = 'none';
+    };
+
+      UI.prototype.showPhotoSession = function (url) {
+        var uiEl = document.getElementById('photos-session-ui');
+        var link = document.getElementById('photos-session-link');
+        var status = document.getElementById('photos-session-status');
+
+      uiEl.style.display = 'block';
+      link.href = url;
+      link.style.display = 'block';
+      status.innerText = "Waiting for selection...";
+    };
+
+      UI.prototype.closePhotoSession = function () {
+        document.getElementById('photos-session-ui').style.display = 'none';
+    };
+
+      UI.prototype.updatePhotoStatus = function (msg) {
+        document.getElementById('photos-session-status').innerText = msg;
+    };
+
+      var ui = new UI();
+      window.ui = ui;
 
                 /**
                  * Data Controller
                  */
-                const controller = {
+                      var controller = {
                   init() {
                     // Start polling for SKU selection
                     setInterval(() => this.checkSku(), 2000);
@@ -864,6 +928,9 @@
                     ui.logStatus('drive', `Drive Check Failed: ${diagnostics.drive.error}`, 'error');
                   }
 
+                  // Capture Token
+                  if (diagnostics.token) state.token = diagnostics.token;
+
                 // Shopify Status
                 if (diagnostics.shopify.status === 'ok') {
                   ui.logStatus('shopify', `Shopify Product: ok (${diagnostics.shopify.mediaCount} media) (ID: ${diagnostics.shopify.id}) <a href="${diagnostics.shopify.adminUrl}" target="_blank" style="margin-left:8px;">Open Admin ↗</a>`, 'success');
@@ -1017,69 +1084,79 @@
                 })
                   .importFromPicker(state.sku, null, item.mimeType, item.filename, url);
               });
-                                  }
-                                };
+                      }
+                    };
 
-                                // --- Google Picker API ---
-                                let pickerApiLoaded = false;
-                                function onApiLoad() { gapi.load('picker', () => { pickerApiLoaded = true; }); }
+                      // --- Google Picker API ---
+                      let pickerApiLoaded = false;
+                      window.onApiLoad = function () { gapi.load('picker', () => { pickerApiLoaded = true; }); };
 
-                                function createPicker(config) {
-                                  const view = new google.picker.DocsView(google.picker.ViewId.DOCS)
-                                    .setMimeTypes("image/png,image/jpeg,image/jpg,video/mp4")
-                                    .setIncludeFolders(true)
-                                    .setSelectFolderEnabled(false);
-                                  const photosView = new google.picker.PhotosView();
+                      function createPicker(config) {
+                        const view = new google.picker.DocsView(google.picker.ViewId.DOCS)
+                          .setMimeTypes("image/png,image/jpeg,image/jpg,video/mp4")
+                          .setIncludeFolders(true)
+                          .setSelectFolderEnabled(false);
+                        const photosView = new google.picker.PhotosView();
 
-                              new google.picker.PickerBuilder()
-                                .addView(view)
-                                .addView(photosView)
-                                .setOAuthToken(config.token)
-                                .setDeveloperKey(config.apiKey)
-                                .setCallback(data => {
-                                  if (data.action == google.picker.Action.PICKED) {
-                                    const doc = data.docs[0];
-                                    const url = (doc.thumbnails && doc.thumbnails.length > 0) ? doc.thumbnails[doc.thumbnails.length - 1].url : null;
-                                    controller.importFromPicker(doc.id, doc.mimeType, doc.name, url);
-                                  }
-                                })
-                                .build()
-                                .setVisible(true);
+                      new google.picker.PickerBuilder()
+                        .addView(view)
+                        .addView(photosView)
+                        .setOAuthToken(config.token)
+                        .setDeveloperKey(config.apiKey)
+                        .setCallback(data => {
+                          if (data.action == google.picker.Action.PICKED) {
+                            const doc = data.docs[0];
+                            const url = (doc.thumbnails && doc.thumbnails.length > 0) ? doc.thumbnails[doc.thumbnails.length - 1].url : null;
+                            controller.importFromPicker(doc.id, doc.mimeType, doc.name, url);
+                          }
+                        })
+                        .build()
+                        .setVisible(true);
     }
 
                   // Init
+                  try {
+                    if (!window.state || !window.ui || !window.controller) {
+                      throw new Error("Core components failed to initialize. Check console for SyntaxError.");
+                    }
                   controller.init();
+                  window.controller = controller; // Re-assert global access
+                } catch (e) {
+                  alert("Init Failed: " + e.message);
+                  console.error(e);
+                }
 
-                              // Drag & Drop Handlers (Global)
-                              const dropOverlay = document.getElementById('drop-overlay');
-                              let dragCounter = 0;
+                      // Drag & Drop Handlers (Global)
+                      const dropOverlay = document.getElementById('drop-overlay');
+                      let dragCounter = 0;
 
-                              document.addEventListener('dragenter', (e) => {
-                                e.preventDefault();
-                                dragCounter++;
-                                dropOverlay.style.display = 'flex';
-                              });
+                      document.addEventListener('dragenter', (e) => {
+                        e.preventDefault();
+                        dragCounter++;
+                        dropOverlay.style.display = 'flex';
+                      });
 
-                              document.addEventListener('dragleave', (e) => {
-                                e.preventDefault();
-                                dragCounter--;
-                                if (dragCounter === 0) {
-                                  dropOverlay.style.display = 'none';
-                                }
-                              });
+                      document.addEventListener('dragleave', (e) => {
+                        e.preventDefault();
+                        dragCounter--;
+                        if (dragCounter === 0) {
+                          dropOverlay.style.display = 'none';
+                        }
+                      });
 
-                              document.addEventListener('dragover', (e) => { e.preventDefault(); });
+                      document.addEventListener('dragover', (e) => { e.preventDefault(); });
 
-                              document.addEventListener('drop', (e) => {
+                      document.addEventListener('drop', (e) => {
                     e.preventDefault();
-                              dragCounter = 0;
-                              dropOverlay.style.display = 'none';
-                              if (e.dataTransfer && e.dataTransfer.files.length > 0) {
-                                controller.handleFiles(e.dataTransfer.files);
-                            }
+                      dragCounter = 0;
+                      dropOverlay.style.display = 'none';
+                      if (e.dataTransfer && e.dataTransfer.files.length > 0) {
+                        controller.handleFiles(e.dataTransfer.files);
+                      }
                   });
 
   </script>
   <script async defer src="https://apis.google.com/js/api.js" onload="onApiLoad()"></script>
 </body>
+
 </html>
\ No newline at end of file
diff --git a/src/mediaHandlers.ts b/src/mediaHandlers.ts
index 314e942..62c02cc 100644
--- a/src/mediaHandlers.ts
+++ b/src/mediaHandlers.ts
@@ -107,7 +107,13 @@ export function getMediaDiagnostics(sku: string) {
 
   const shopifyId = product.shopify_id || ""
 
-  return mediaService.getDiagnostics(sku, shopifyId)
+  const diagnostics = mediaService.getDiagnostics(sku, shopifyId)
+
+  // Inject OAuth token for frontend video streaming (Drive API alt=media)
+  return {
+    ...diagnostics,
+    token: ScriptApp.getOAuthToken()
+  }
 }
 
 export function saveFileToDrive(sku: string, filename: string, mimeType: string, base64Data: string) {
diff --git a/src/services/MediaService.ts b/src/services/MediaService.ts
index d4ae12c..50a77ab 100644
--- a/src/services/MediaService.ts
+++ b/src/services/MediaService.ts
@@ -139,6 +139,20 @@ export class MediaService {
     // Find Shopify Orphans
     shopifyMedia.forEach(m => {
         if (!matchedShopifyIds.has(m.id)) {
+            let mimeType = 'image/jpeg'; // Default
+            let contentUrl = "";
+
+            if (m.mediaContentType === 'VIDEO' && m.sources) {
+                // Find MP4
+                const mp4 = m.sources.find((s: any) => s.mimeType === 'video/mp4')
+                if (mp4) {
+                    mimeType = mp4.mimeType
+                    contentUrl = mp4.url
+                }
+            } else if (m.mediaContentType === 'IMAGE' && m.image) {
+                contentUrl = m.image.url
+            }
+
             unifiedState.push({
                 id: m.id, // Use Shopify ID keys for orphans
                 driveId: null,
@@ -148,7 +162,9 @@ export class MediaService {
                 source: 'shopify_only',
                 thumbnail: m.preview?.image?.originalSrc || "",
                 status: 'active',
-                galleryOrder: 10000 // End of list
+                galleryOrder: 10000, // End of list
+                mimeType: mimeType,
+                contentUrl: contentUrl
             })
         }
     })
diff --git a/src/services/ShopifyMediaService.ts b/src/services/ShopifyMediaService.ts
index e939223..fb5e892 100644
--- a/src/services/ShopifyMediaService.ts
+++ b/src/services/ShopifyMediaService.ts
@@ -78,6 +78,17 @@ export class ShopifyMediaService implements IShopifyMediaService {
                     originalSrc
                   }
                 }
+                ... on Video {
+                  sources {
+                    url
+                    mimeType
+                  }
+                }
+                ... on MediaImage {
+                  image {
+                    url
+                  }
+                }
               }
             }
           }