MP4 files contain video and audio data for computer playback. One of the most common video file types, “MP4” actually refers only to the file container – the data inside may be encoded with any one of several formats, such as H.264. Therefore, even while one MP4 may play fine on your computer, another may run slowly or stutter. In many cases, slowdown during video playback is caused by outdated video drivers or codecs, running a video too high-resolution for your computer’s speed, or poorly optimized video files and video players. Writer Bio
