[Phreddo]

i recommend against the codec pack becuz i've had it make some files unplayable, and it does so much, that it's hard to troubleshoot one bad codec.
VLC is the shizz for playing all the standard and non-standard formats.

The solution here for the Mogul .mp4 video is to rename the extension to .3gp

Then it will play in Quicktime. it's so stupid that QT can't just play it as is, but i guess I'm just too dumb to see the genius in it.

Makes me think of Invader Zim where he meets Gir and he asks
Zim: "Is it supposed to be stupid?"
Tallest Purple: (supressing laughter) "It's not stupid, it's advanced!"