I also stopped using the YouTube app in favor of the Brave browser on my desktop and my Android phone (no extensions needed). I can't remember the last time I saw an ad on YouTube!

I also use Brave on all my devices - it also works on Amazon Prime. Prime frequently made me offers to upgrade to an ad-free experience that I didn't understand... surely this is a bug, I already have an ad-free experience. Then I installed the Prime app on my TV and realized the constant barrage of ads that Brave has been protecting me from!