If you ever watched a full movie chopped into 12 separate uploads, made your own Razr ringtones from downloaded YouTube audio, or got absolutely wrecked by a "ghost on tape" jump scare video, this one's for you. YouTube turned 21 this year - created on February 14, 2005, which means the platform that basically raised a generation is now old enough to drink. And a recent Reddit thread is sending millennials on a deeply emotional trip back to where it all started.