YouTube still provides RSS feeds for individual channels. Combine that with mpv's yt-dlp integration and you can avoid the official web frontend altogether.
I don't know how long it's going to last though, with the current trend of rug pulls and enshittification.
Youtube have been gradually cracking down on yt-dlp by blocking IPs that download (presumably without watching the adverts, or some other method to fingerprint it). Currently it's mostly annoying as I have to rotate through IPs every few days. But I imagine it'll get worse and worse until I stop watching youtube.
Pretty sure it's only gonna get deleted if either a) enough people use it so that a MBAs notice or b) the way it's accessing the data blocks a feature that an MBA wants
I don't know how long it's going to last though, with the current trend of rug pulls and enshittification.