https://github.com/yt-dlp/yt-dlp

I use Tailscale with my Jellyfin server.

YouTube audio quality isn’t amazing, but it’s not that bad if you get the right format. Using yt-dlp, you can get opus audio that sounds way better than mp3. Example: yt-dlp -f 251 https://www.youtube.com/watch?v=dQw4w9WgXcQ

I use Traefik and configuring everything through docker-compose files is way more convenient than nginx or a proxy manager (never used one though). Traefik also has a web interface, but you can’t configure anything with it.

If you’re on Linux, Metadata Cleaner might work. https://flathub.org/apps/fr.romainvigier.MetadataCleaner

I just use Jellyfin for movies and shows. I don’t listen to music or read ebooks, and I buy all my games through Steam because I use Linux.

Neither. AV1 if available, if not I download a high quality x264 copy and do my own transcode. AV1 is high quality with smaller file sizes, but isn’t very common right now.