You can provide a video on the product page for a better understanding of the product. A product video can give a detailed illustration of the product which can help your customers to make a better choice. Provide the embedded URL of a YouTube video and tag in case of product variant.
Follow the below steps to add a product video:
Now you have added the youtube videos on your product page, you might want to make these videos responsive so they appear nicely on mobile. Please read this topic to find how to make your embedded videos responsive.