YouTube has reached a milestone of over 4 billion global video views per day - the equivalent of half the world’s population watching a video every day. And they continue to grow.

The founders of YouTube on Wednesday bought popular bookmarking site Delicious from Yahoo, promising to keep it up and running and maintained.

YouTube, which can put anyone into the spotlight, is itself becoming a star, at least when it comes to hiring employees.

YouTube co-founder and chief executive Chad Hurley is leaving his position as head of the online video-sharing service.

YouTube has announced that the number of videos being viewed each day on its site has broken the two billion mark.