If they’re on android, try revanced. It’s a patched YouTube apk, so the interface is the same (unless you change stuff, like, for example, disabling shorts - but by default, it’s the same).

Yes, except online exams. The online spyware they make you install for those is designed not to work on a VM or anything like that. I had to keep a barebones windows partition around just for that.

You’re welcome! I’ve had to do that exact process more than once, so I had a sneaking suspicion you weren’t quite up shit’s creek yet.

Live boot Linux, install testdisk in there, and try to see if it can find it. It’s probably still there.