The MP4 or MPEG-4 Part 14 format is a media container developed by Apple in 2001, which can contain audio and video files, as well as static images and text (for example, subtitles).
Files with the extension .mp4 are very popular because they have a high level of file compression while maintaining high-quality video and audio. The main feature of the MPEG media container is that it does not have data encoding, therefore it is easily played in any codecs and players, and on any devices. Also, this format allows you to broadcast streaming data, so it is widely used for online broadcasts on the Internet.
Currently, MP4 is one of the most popular formats for video files, so the conversion from AVI to MP4 is a popular service among Internet users.