I used to have a YouTube account to host my public videos. (It still exists, although most of its contents have been unlisted.) The same account was what I used to subscribe to other channels and watch YouTube content. In an effort to disentangle my daily life from Google and other cloud service providers, I decided to stop using my YouTube account and replace it with a suitable feed for the YouTube channels I follow.
It turns out that YouTube still offers RSS feeds for channels as well as playlists. Just funneling those into my feed reader would get me 80% to my goal, but I also kinda wanted information like video length and video thumbnails shown on my video feed, so I decided to implement it as a custom software project.