whatever browser you're in - if you get the 3 videos problem, forget resetting your cookies 2 million times, just open YouTube in a private window. AdBlock will do its thing and you won't get hounded/locked out.
This seems to work in all the browsers that I use.
Hamburger menu -> new Private Window - youtube.com
YOUTUBE atrocities solved.
Re: YOUTUBE atrocities solved.
Worked for a while on Firefox private but now getting blocked there too 