What are the video formats ?

This article lists the video format (ie data structure used in video).

MP4 is a standard developed by the Moving Picture Experts Group (MPEG);

The MPEG-4 format compress

• video with the MPEG-4 video encoding.
• Audio with AAC compression.

Can store data along the video such as:

• subtitles,
• still images

MPEG Video format is standard developed by the Moving Picture Experts Group (MPEG) compressed using:

• MPEG-1 used with video compact discs (VCDs)
• MPEG-2 compression (higher-quality used for DVDs)

If you'd like to back up videos in CD/DVD, you probably need MPEG format.

The m3u M3U file is a playlist file format used often to point to a stream on the Internet (ie a file splitted into multiple files)