Adding video gallery:

• Drag & drop "Gallery" from main toolbar;
• Choose needed gallery composition;
• Select gallery and click "Pictures" section in right toolbar;
• Click "Add images/videos" button;
• Click "Add New" choose needed video composition and upload it;

Note. You can just drag and drop video file from your computer to website builder.

Search video::

• Select "Gallery media manager" and click "Full media library" button
• Choose "Show:" select from dropdow-menu "Video"

Adding store video:

• Drag & drop "Commerce" from main toolbar;
• Choose store composition;
• Select "Edit products" in right toolbar;
• Choose products "Images" and click ";
• Click "Add New" choose your video file and upload it;
• Select video file and click "Apply";
• Click the "Apply" button in the item editor;

Note. You can just drag and drop video file from your computer to website builder;
You can leave the main product image and add video to the product gallery.