Americans viewed 11.4 billion online videos during July, 5 billion of which were found on YouTube, according to comScore.

Three in four people online tuned into at least one clip and, in total, Americans spent 558 million hours behind their computers watching online video.

Google, which owns YouTube, was the leader with 44 percent market share, followed by Fox Interactive Media, owners of MySpace, with 3.9 percent, comScore said. So if you have some more spare time, check out the UberPulse video channel on YouTube :-)

By Mark Boslet, Editor at Large.