StopTheMadness for Safari in Mac app store provides extensions for Firefox and Chrome. At leas it just to, i think it still does.

On firefox unblock origin blocks all ads and video background player allows background playing on mobile which is awesome.

install ublock origin and put following filters

||youtube.com^$3p,frame,redirect=click2load.html

||youtube-nocookie.com^$3p,frame,redirect=click2load.html

Didn't change anything here.