.M4U File Extension
File Type
MPEG-4 Playlist
File Format
File
Common?
No
File Description
Playlist of MPEG-4 video files; contains links to movies and video clips, not the actual files
Program(s) that open m4u files
Mac / Windows:
Apple QuickTime Player or other video player
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/m4u
