You mean can the client change the video link in the editor? I’m not sure what happened at one time I think they were, but many of the links are not editable anymore.
The workaround I use is create a collection for videos. And then use a collection list and use an option, switch, or some method to specify or limit what video goes where.
For instance, I deal with Actors a lot and they may have multiple reels but the design calls for one on the main page. So often I use a switch to turn off and on the video. It’s not ideal especially if there are a ton of videos to keep track of. Clients often forget a switch and then have multiple videos show up on the main page. But it allows the client to change their video links themselves in the editor. Maybe someone else has a better workaround for the editor limitations.