Greasy Fork

I've been using it close to two years now. Probably the best adblocker for youtube out there.
Helps the creator and makes the free youtube experience bearable. Forces you or makes you realize to also take breaks.
Unmuting works with 1.4.2 again.

What I forgot to add: not even Enhancer for YouTube has this type of blocking.
I had to uninstall it, I wasn't using the blocker anyway, the r**** blocked me from his comment section because he can't take critique. It was unrelated to adblocking.
I wrote him an email afterwards pointing out the r***** adblocking he employs. He reads his mails, he answered one I wrote him before.

Glad to hear you've been getting good use out of it :)