In the product creation or editing menu, you have the option to add a YouTube video. To do this, simply copy the link to the video you want and add it to the appropriate field, as shown in the screenshot.
The "Sort Order" field determines the order in which your videos will appear on the product page.
If you want to add a YouTube Shorts video, the link to it needs to be copied differently for it to work correctly. Right-click on the video and click "Copy embed code".
In the copied text, find the src parameter and copy the link specified in it - this is what you will need to insert in the Admin Panel.