AVI stands for Audio Video Interleave and is a type of file used by home computers and media players. The .avi file extension was created by Microsoft in 1992.
AVI video files are typically very large, but they can also be compressed into smaller packages so that the files can be transferred more easily. The files can be played in most mainstream video players, offer a high degree of sound and video quality and require no extra codecs. This means that in most scenarios, these files can simply be clicked on and played using standard PC software and do not require a specialized program or media player.