> standard 1080p/H264 is definitely not doable at proper speed
> on a 1.5GHz G4, anyway, and 1.8GHz wouldn't be either.

1080p/H264 on 1.33 GHz G4:
http://www.youtube.com/watch?v=aHhWsrWz2Ns

720p/H264 on 1.0 GHz dual-G4:
http://www.youtube.com/watch?v=Aa-yAafzRAc

How's that even possible? I read that this mysterious CorePlayer doesn't even use the GPU but only CPU + AltiVec:

http://www.cubeowner.com/forums/index.php?showtopic=14431#entry100336
http://www.cubeowner.com/forums/index.php?showtopic=14236#entry98753
http://www.cubeowner.com/forums/index.php?showtopic=14219&st=15#entry98630
http://forums.macrumors.com/showpost.php?p=6215534
http://forums.macrumors.com/showpost.php?p=6156722