Playing different video formats on the Mac is a real pain. Animemusicvideos.org has a nie list of, if I need to play a format, here is what I need to do with the short answer that beside Quicktime, the main thing you need is VLC: FormatPlayer NeededMP4VLCAVIVLCWMVVLCRMVBRealplayer 10 for MacOGMVLCMKVVLC...