90% of Twitter video views happen on a mobile device

"The majority of Twitter users (82%) watch video content on Twitter and most watch on a hand-held screen. A staggering 90% of Twitter video views happen on a mobile device, according to our own internal data. But Twitter users don’t just lean back and watch video; they also lean in to create it. Twitter users are 1.9x more likely to have uploaded a video online (anywhere) than the average U.S. internet user.
What types of video do users want more of on Twitter? Among users that have seen the following types of video content, many would like to see more of the same on Twitter, including breaking news (64%), clips from live sports shows (54%) and clips from TV shows (50%). And Twitter users say they want to see more videos from three top sources: celebrities (45%), other users (40%) and brands (37%)."

Source:  Blog post from Twitter, 13th May 2015