Also, checkout NewPipe with built in SponsorBlock functionality: https://github.com/polymorphicshade/NewPipe
Honestly, I do not understand why one should use this. I have recently seen some high quality YT videos, each of a length of 30-60 minutes. In those videos where some sponsors mentioned which took only one or two minutes. Seems perfectly OK for me to support the creators. I guess if many people block sponsor content, this kind of vids will die.
If they use ads they will block.
If they ask for payment they will pirate.
Luckily these people are the minority or there would be no content to begin with