one of the people in a youtube video that gets mad view counts. although youtube star status can be acheived through any type of video, people who are youtube stars are usually considered to be the type of people who have no lives and think their videos make them awesome beyond comparison.
Gary Brolsmein dancing "Numa Numa" caused him to be one of the youtube stars.
Someone who has large quantities of upload views and subscribers. They add new videos consistantly and often engage with their subs. Some of these stars include: Brittani Louise Taylor, Shane Dawson, Nigahiga, Smosh, Fred, JoeNation, iJustine, OlgaKay, Phillip DeFranco, Lisa Nova, MysteryGuitarMan, and SwiftKarateChop.