hmmm..just added it to my test fresh v1.7.2 and it worked just fine with your template (the one you showed)
P.S. quicktime opened the file and it was "showing" a white picture for a few seconds, nothing else...same deal was when I opened the page in IE and FF, it showing like its playing something, but only white picture showed..perhaps the file itself is corrupted?
Anyways, it seems to me the problem you have is missing .3pg file on the server. try open it directly in the browser, you'll get 404 page.