A November 2012 study by the Interactive Advertising Bureau (IAB) found that video viewing on mobile devices is very closely related to video-sharing. In the survey of 200 mobile video viewers, 92% said that they share mobile video content with others.

The most popular method of sharing listed by respondents was through posts on Facebook or similar social sites (56%). But a lower-tech method of sharing was also quite popular with respondents: 44% said they share videos simply by passing their mobile device off to a friend.

via Nearly All Mobile Video Viewers Are Mobile Video Sharers – eMarketer.