Given how popular YouTube is on the web, it shouldn’t come as a big surprise that a lot of people also enjoy watching video clips from their phones. And, given the surge in Android, iPhone, and iPad sales, that adds up to a lot of videos. Today, YouTube is announcing just how much people are watching: a whopping 200 million video views per day, up 3x from January 2010.

In addition to this stat, YouTube is also expanding its mobile content library — but only for its