Added a bit to uBO's description; After many delays, seems Google has declared WAR on adblockers, especially uBO if you haven't noticed. (uBO has had to disarm every way that Google's trying to stop them on Youtube, like lots. Once a day lately, and at one point was multiple times of day.) As of next year, Manifest v.3 is finally coming out which will cripple adblockers on Chrome and Chrome based browsers. I strongly suggest to everyone; USE FIREFOX if you hate ads, for Firefox isn't buying it.^^ It's the only browser that'll fully support adblockers now once that finally rolls out.
As I said in another thread; KEEP A EYE ON THIS SITE and check it before you use youtube so you know if it's safe if you got uBO. Also they've admitted to adding a slowdown if you got the adblocker; this filter should fix it:
Code:
www.youtube.com##+js(nano-stb, resolve(1), *, 0.001)
Keep in mind, that will only stop the delay, not the "Don't use adblockers!!!" thing they're doing. CHECK THE REDDIT TO FIND OUT HOW TO FIX THE POPUP!