I don't do adds. I might search for a video giving me the information I want and start 6 of them before I find the one that works. I am not sitting through 30 second commercials for each one only to have to turn it off after 5 seconds of "this isn't what I am looking for'. I have used the add blocker plus add on for firefox and never see a commercial on youtube. I also have it on my phone firefox browser.