Rise of amateurs

Unlike traditional movies largely dominated by studios, clip movies were overwhelmingly supplied by amateurs. In May 2006, The Economist reported that 90% of clips on YouTube came from amateurs, a few of whom are young comedians. It, in effect, also brought amateur talents.
In 2005, two Chinese students Huang Yixin and Wei Wei, now dubbed as "Back Dorm Boys" showed their talent in lip-synching in a song of the Backstreet Boys, with their self-conscious grimaces in a video uploaded to some clip websites, has instantly become renown. Not only did they appear on television shows, concerts, but were also granted a contract by a media company in Beijing for lip-syncing for cash.
An earlier celebrity was David Elsewhere, a talent at popping and liquiding. His performance to Kraftwerk's song Expo 2000 at the talent show Kollaboration in 2001 was widely spread on the internet leading later to his being hired to participate as a dancer in advertisements for Heineken, iPod and Pepsi.
Reference : http://en.wikipedia.org/wiki/Video_clip