completion

I think the ISO specifically wasn't reproducible but now it is.

Nix packages are probably what you're thinking of. They are reproducible

I use freetube, https://github.com/FreeTubeApp/FreeTube

I don't think it has a mobile version

It might not quite be what you want because it doesn't rely on YouTube's algorithm at all. You subscribe to channels and freetube will show you videos from those channels. Well I guess you can view trending videos and such but it isn't personalized.

One downside is I find it difficult to discover new channels because there is no algorithm recommending stuff. Watching a video and then looking at the 'up next' list is helpful though.

Check out sonarr and radarr

They allow you to automate downloading stuff.

Check out: https://docs.podman.io/en/latest/markdown/podman-systemd.unit.5.html

Such a thing exists? I haven't been able to find something that will connect to my accounts and pull data automatically.

I feel that same, I stopped using mint for that reason but I haven't found a self hosted replacement yet.