How to Block Specific Ads on YouTube

Have you ever gone on a YouTube binge, only to get the same annoying pre-roll ad over and over again? It’s a systemic issue, thanks to Google’s user-targeting advertising algorithm. The easiest way to solve this problem is to pay for YouTube Red and get rid of all the advertising. The easiest free way to do it, however, is below.
by Michael Crider via How-To Geek