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MPEG-4 is a method of defining the comprehension  of audio and visual (AV) digital data. It was introduced in late 1998.

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The .mov file format is often used to save movie files and video clips to a user's hard drive or other media device.

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AVI is an acronym for Audio Video Interleave. The .avi file format is a container file format that was introduced by Microsoft in 1992.
It can contain a variety of files within the container file. Container files with the .avi file extension often contain audio and video data.

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Is a given name to a specific  kind of format.

There are many types of files like video file, Text file, etc...

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A file with the WMV  is a Windows Media Video file, compressed with one or more of Microsoft's video compression formats. It's a common format used to store video in Windows, which is why some third-party programs use it for things like short animations.