I often run into issues playing video media on mobile devices. It’s been something that has haunted me since the days of Windows Mobile on the Palm Treo — remember those early smartphones? Believe it or not, it’s still an issue years later with current tablets and smartphones. The problems that I’ve encountered have generally manifested themselves as either the file not playing at all due to type mismatches, or audio and video being out of sync. Some people live with these problems. I think it ruins the experience. 
