M3U file extension
Media Playlist File
The .M3U file format is a plain text file which contains the names (and sometimes the physical location) of one or more media files.
A compatible media player will then play through the media files in the order specified in the .M3U play-list file.
The .M3U file only contains text and does not contain any media data.
The format was originally developed for WinAmp but is now supported by many other media players.
These files contain a single header line (#EXTM3U) followed by an entry for each media file. The order of these entries determines the sequence the media will be played.