I'm thinking the problem is Quicktime plugin being stupid under Safari...

My Pismo

10.3.9

400 MHz PowerPC G3

256 MB SDRAM

Trying to play your movie on your problem, by viewing your post from the following browsers and clicking on your link:

Safari 1.3.2 plays sound only

Firefox 2.0.0.16 plays ok

Camino 1.6.4 plays ok

So then I go back to Safari and do a copy link from your post. I open Quicktime and paste the link into open url...and Quicktime plays it ok!

Go figure...