Google has extended the rollout of the HTML5 version of YouTube to give better access to mobile devices

YouTube has updated its mobile site that now offers faster speed, along with the ability to create playlists

A YouTube vulnerability has been exploited by hackers who used it to target fans of Canadian singer Justin Bieber

YouTube users watched 14.6 billion videos in May, says ComScore, an all-time high for Google's video service

Now aged five, YouTube has twice as many viewers as the major US TV channels, but critics say it could do better

Viacom claims Google's YouTube prove the video-sharing site tried to make money from copyright infringement