Let's see what we can see.
https://www.youtube.com/watch?v=diYAc7gB-0A
Later Note: Ahhhh. Ok so I used to have an oEmbed plugin for CKEditor, buuut that was CKEditor4 which just End-Of-Lifed and so BackdropCMS Core flipped everyone to CKEditor5 and none of the Backdrop Modules providing plugins for CKEditor work. I not realize that embedding video is Not going to work the way it Was going to work, so now it's gotta work totally differently and, I'm going to go out on a limb here, a new Content Type will be involved.