I’m pretty sure I was at the same point years ago. The good thing is, next time you look into containers it’ll likely be really easy and you’ll wonder where you got stuck a year or two ago.
At least that’s what has happened to me more times than I can remember.
The group tiers you’re talking about exist and are called trash guides. If you’re only on public trackers the groups might not be as prevalent, but e.g. TorrentLeech is more likely to have them.
The letterboxing with ultra wide monitors might be possible to solve locally with your video player. For MPV there’s the dynamic-crop.lua script, which is not perfect but works quite well.
I’m using mpv with Jellyfin on my PC through jellyfin-mpv-shim.
Edit: For Windows you might want to check out MPC-BE. I’ve found some mentions of “View -> Video Frame -> Touch Window From Outside” but I never tried it.
From a quick glance I can imagine many of those services don’t need much maintenance if any. E.g. RickRoll likely never needs any maintenance beyond the initial setup.