Originally Posted by johicks

Lord of the Rings, please use names instead of single letters. What are "VLC and M Player". Unfortunately we are not all as computer literate as yourself. John

Originally Posted by Lord of the Rings

I'd recommend this player VLC - (click on link) _ (choose nearest mirror site) as it has in-built codecs & is very reliable. Another good one which is similar to VLC but can do the odd thing VLC can't is MPlayer (Click on link).
And if you wish to change one of these to be your main video player, then see How to change default program in OSX

If you wish codecs for QuickTime player, then you should get DivX, _ XviD, _ 3ivx. And perhaps ffmpegX and FFusion. And for QT support for WMV files then Flip4Mac WMV Player