You CAN add products from multiple collections into your video.
Use the ‘product library’ dropdown menu to switch between collections.
Select products from within your product collections by clicking individual products or using the select all feature.
Head back to the ‘product library’ dropdown menu to select products in other collections.
Any changes to your products in Shopify that you have connected to a shoppable video you made in Imursif, will be displayed when the video is restarted or next played.