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:
- 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)