Info about Audio Video
Audio video interleave
It would be a real pain not to be able to watch a video with sound on your computer. Well, you should know that there were times when watching a video with sound of your computer’s hard drive was practically impossible. Only after Microsoft developed the audio video interleave format somewhere around the year 1992 this was possible. The audio video interleave or .avi as it is more widely used, is a video format that allows video and audio files to be put together and synchronized in a single file. If it wasn’t for .avi, it would probably be impossible to rip a DVD so that you could store it on your computer.
The .avi format is still used