Fix missing video when advanced js bundling used

Author: ihor-sviziev

app/code/Magento/ProductVideo/view/frontend/web/js/fotorama-add-video-events.js

@@ -138,10 +138,9 @@ define([
          * @private
          */
         _create: function () {
-            $(this.element).on('gallery:loaded',  $.proxy(function () {
-                this.fotoramaItem = $(this.element).find('.fotorama-item');
-                this._initialize();
-            }, this));
+            $(this.element).data('gallery') ?
+                this._onGalleryLoaded() :
+                $(this.element).on('gallery:loaded', this._onGalleryLoaded.bind(this));
         },
 
         /**
@@ -171,6 +170,14 @@ define([
             }
         },
 
+        /**
+         * Callback which fired after gallery gets initialized.
+         */
+        _onGalleryLoaded: function () {
+            this.fotoramaItem = $(this.element).find('.fotorama-item');
+            this._initialize();
+        },
+
         /**
          * Clear gallery events to prevent duplicated calls.
          *