NixOS can become quite complex, so maybe stay away from it until you know more about how to manage your system ;)
The other options you’ve mentioned here are good, but EndeavourOS is based on Arch, so that may be contradictory to what you’ve said earlier.
I still prefer PeerTube.
(it’s part of the Fediverse. We’re also part of the Fediverse here on Kbin and Lemmy.)