For some time I've been tinkering with a script which manages my own fine-grained youtube subscription preferences, periodically scrapes various pages for metadata, and then as necessary extracts videos by using the youtube-dl utility. The end result is a directory on my machine which always has a few interesting videos to watch, ad-free, tracking-free, network connection free, using my favorite full-featured video playback tools.
I think others seeking a minimalist youtube experience might enjoy youtube-dl: https://rg3.github.io/youtube-dl/