Sorry to say but we didn’t seem to understand your concern. Could you please elaborate your concern more with some useful Screenshots so that we can better understand and assist you accordingly.
Further, if you are referring to knowing how you can add Video to the Product page, then please check out the following Theme Documentation guide: https://xtemos.com/docs-topic/product-video/
You need to edit your mentioned Product page with WPBakery page builder editor first > there you need to edit the Row > then under the Row Settings when you scroll down a bit you will get to find the Use video background? option > in that you can change the link for the Video: https://snipboard.io/uECdRU.jpg
Actually, you had added the Embedded URL of the YouTube instead you need to enter the direct YouTube Video URL like we have done now on your Site for the mentioned Product: https://snipboard.io/sOjthA.jpg
Please check back your Site after completely clearing the browser and server cache.