Not that I have any say in the matter but I think this kind of question is fine for the selfhost community. It’s still in the spirit of “how to do xyz with my own hardware / less dependence on a third party”.

The other suggestions have covered my own. I did want to add that good resources for finding these kinds of tools are often called Awesome lists. Awesome self-hosted. Awesome CLI. Awesome social media. You get it. I’m not sure where the trend started but I stumbled on them after getting fed up with the likes of Slashdot and AlternativeTo.

They’re usually a community-maintained git repo on one of the major platforms. This list has quite a few hits for “YouTube”, for instance: https://github.com/krzemienski/awesome-video

With proper partitioning and backup strategies deployed during setup an admin could inexorably hose the OS and it wouldn’t be a big deal. I can count on one hand the amount of times it’s made sense to nuke a Linux machine. None of those incidents required I redeploy from scratch. Just re-install, log in, and all the data is exactly where it ought to be.

I’ve reguarly had to re-install Windows machines from scratch as if they were some eldritch beast whose rage was only calmed after the ritual sacrifice was complete.