One can convert M4V files to AVI files by either using a program that offers such conversion properties, such as M4V Converter, or by visiting a website that converts the file online, such as Zamzar. When using an online conversion method, the user has to provide his email address to receive the converted files.
The file format M4V was developed by Apple, and its properties are similar to the MP4 file format. The main difference between the two is that M4V files contain Apple's digital rights management protection, which is known as Fairplay. Most songs that are downloaded from Apple's iTunes store are in M4V format. This prevents the files from being played on any computer other than the one the music file was procured on. Due to the similarities between M4V and MP4, it's usually possible to play M4V on unauthenticated devices by changing the file extension from “.m4v” to “.mp4.”
The AVI file format stands for Audio Video Interleave and was developed by Microsoft in 1992. AVI files combine both video and audio into one single file for simultaneous playback. One advantage of AVI is its simple architecture, which allows the files to be played on multiple devices, unlike Apple's M4V file format.