Hello @cherylr1039 ,
If you're using the cross device editor, you can insert video links from a variety of sources, including YouTube. If you're having issues with a particular site's links make sure they're public, they're the Share URLs that the site provides, and that those particular URLs are accessible in other ways - such as in incognito, on other browsers, or on other devices and networks. Otherwise, the image-link workaround is always available as well.
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