M3U files are a type of playlist where the location of each item on the playlist is placed on a new line.
Lines starting with a # are comments.
# This is a comment /music/opeth/white cluster.mp3 /music/moonlapse vertigo.mp3 http://ccmixter.org/a/song.mp3 /video/mononoke.avi
The following might be list of web based radio stations. VLC affords the switching between these web-radio stations by selecting next or previous track.
http://111.22.333.44:8024 http://55.666.7.888:8024 http://188.8.131.524:8024
The MIME-type of M#U-files is audio/x-mpegurl