<http://www.microsoft.com/windows/mediaplayer/en/download/MacRelNotes.asp> is where there are details on the Microsoft product used on my Mac to do the Stanford demo.
Demo page at <http://stanford-online.stanford.edu/demo/index.html>
Just now URL <http://stanford-online.stanford.edu/demo/demo-22.asx> not responding.
 I am at the demo page and I click the URL <http://stanford-online.stanford.edu/courses/mis214/apr06/embed-22.asp>. Next Netscape is at <http://stanford-online.stanford.edu/courses/mis214/apr06/float.asp?stream=100>.
The image invites me to "Click anywhere on this screen to start the video.".
When I do it offers to send me a file that I already have: "990406-mis214-100.asx".
It seems to think that I have yet to install the extensions.