BTW The website is perfectly rendered with current OWB release,
incl. embedded video player.

http://www.exception-dev.de/mos/OWB_video.png

But on my Peg2/G4 playing the video causes 100% cpu load
and the video is at low speed.

What about the mac mini g4? Is video playback better than on
my peg2? Can someone test it?