MP4 is the most prevalent video file format (MPEG-4 Part 14). MP4, Apple’s preferred format, is compatible with most devices. It stores video, audio, and text files using the MPEG-4 encoding process, but it has a lesser resolutionRefers to the number of pixels, both horizontally and vertically, used to either capture or display an image. The higher the resolution, the finer the image detail will be. than some others. MP4 can be used for popular social media sites such as YouTube, Facebook, Twitter, and Instagram.