On a sidenote am I imagining things or do videos actually look a tiny bit better in YouTube? This really has puzzled me. I downloaded a few favourites and watch them on VLC or Infuse on my AppleTV. In the YouTube app I can use the "nerd stats" to confirm I am viewing the exact same video/audio streams... ... it could be my imagination but it seems like YouTube does a really subtle kind of filter that makes the "block…
In particular, I like the anime4k shader pack, which is ML-based but runs in real time in mpv (and I think VLC as well). While it is tuned for anime (as is obvious from the name), it has decent denoise and deblur which often make YT content more watchable and a restore step that does a really good job with compression artifacts but is a bit too tuned for anime so may not always work, or even make things worse. See https://github.com/bloc97/Anime4K/releases