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Check out rss-bridge

I used to have direct feeds from my YouTube subscriptions, but they either killed or moved that feature. This runs on the same $5 vm as my RSS feed reader and works great.

https://github.com/RSS-Bridge/rss-bridge

Also check out https://github.com/DIYgod/RSSHub, it's aggressively compatible with websites that refuse to do RSS, and has a large community that keeps it up to date

Combining rsstail and youtube-dl can get you that easily.