Mumble?

FreeTube is one of the last remaining youtube frontends in the game. Piped got nuked, Invidious is still kinda fighting.

Have you tried https://byebyepaywall.com/?

It should get code from own repository and display for better effect :D

related

Can you recommend lifetime access courses in offline too instead of subscription?

I’m tired of this model, where you just wanna have access to one single course with offline mode and they offer 1-month subscription for all of them. Who has time to check them all?

Another resource https://ryanstutorials.net/linuxtutorial/