The writing is on the wall for easy ripping. If there's any YT content you expect you'll want to preserve for a long time, I suggest spinning up https://www.tubearchivist.com/ or something similar and archiving it now while you still can.
This solution looks interesting, but I am technical enough to know that this looks like a PITA to setup and maintain. It also seems like it is focused on downloading everything from a subbed channel.
As it is now, with a folder of downloaded videos, I just need a local web server that can interpret the video names and create an organized page with links. Is there anything like this that is very lightweight with a next next finish install?
But if they decide they have to, they can do it fairly trivially.
You already need such things for certain formats.
I think we can safely assume that the only content under DRM at YouTube today is the content where it's absolutely legally necessary.