How to successfully play various MP4 videos on all Android devices? Why Android won't play MP4 files? Actually, Many of the MP4 fans have been asking "Why Android won't play MP4?", that's because the compressed way for MP4 video can be different and complicated. Convert MP4 to Android format as the best workaround and easily solve can't play MP4 files on Android-powered Samsung Galaxy, HTC, Motoro...