Instance is hexbear.net, check it out for yourself, doesn’t work in browser for me without an account but it does work in liftoff without one for some reason.
It is weird that a lot of commenters here want to tell you what they are but don’t say how to find this information by yourself.
Pi-hole doesn’t work for blocking youtube ads, it is the weak part of dns adblocking, since you’d have to block youtube itself