OS 9 doesn't (natively) do MPEG-4. I might be able to remedy this in the not so distant future however 
That being said, interestingly enough, if I disable JavaScript and load the page it (almost) appears normally, except the plugin is not loaded. When I destyle the page with JavaScript on, however, I *do* see the plugin frame. Can you post a screenshot of that so I can see what you're seeing? Does that plugin frame not work either?
A while ago when I was working on 9.0.4 I had an idea for "agents" for troublesome sites on a case-by-case basis that acted as helpers when the browser itself was unable to handle the content. The helpers would pull links and content out of the page and give basic functionality (so in this case, pulling out the embedded video links so you could at least download the video, even if you couldn't do anything else). This is not a road I want to go down because then I end up writing up a huge batch of exceptions instead of fixing core problems, but it might be what we have to do in the interim.
That being said, interestingly enough, if I disable JavaScript and load the page it (almost) appears normally, except the plugin is not loaded. When I destyle the page with JavaScript on, however, I *do* see the plugin frame. Can you post a screenshot of that so I can see what you're seeing? Does that plugin frame not work either?
A while ago when I was working on 9.0.4 I had an idea for "agents" for troublesome sites on a case-by-case basis that acted as helpers when the browser itself was unable to handle the content. The helpers would pull links and content out of the page and give basic functionality (so in this case, pulling out the embedded video links so you could at least download the video, even if you couldn't do anything else). This is not a road I want to go down because then I end up writing up a huge batch of exceptions instead of fixing core problems, but it might be what we have to do in the interim.