reddit

“The way it works: If a video violates the guidelines, it will be demoted -- removed from the front pages and marked as "age restricted" -- so only registered YouTube users who claim they're over 18 can watch. YouTube's Most Viewed and Top Favorited pages are often where videos go to become mega-viral sensations, so if you want your vid to qualify for this viral launch pad, you'd better not break the rules.” source...