Hello,
You don't have the player that you need to view the video.
The videos are in Real Audio format, and also available as Windows Media Player files.
So, you need to install one of the following players if you want to view the videos:
Real Player
Windows Media Player
Flip4Mac
All the above players will install and run on both Intel and PowerPC Macs. But, Windows Media Player will run in Rosetta on the Intel Macs and is no-longer supported by Microsoft.
But, they will all work.
Flip4Mac is a 3rd-party program that will enable Apple's QuickTime Player to play Windows Media Files.
Anyway, install one of the above (or all of them if you like), and you'll be able to view your videos just fine. Make sure you have your browsers closed when you install the players, and if asked, enable them to display content in your web browser.
Note that you should only need either Flip4Mac or Windows Media Player. The Flip4Mac plug-in will replace the Windows Media Player Plug-in in your web browser.
The Real Player plugin should also be sufficient for you.
I hope this helps.
Let us know if you have other questions.
P.S., if you'd like, go ahead and click the "Helpful" or "Solved" buttons on any of the posts / replies above if you feel they were helpful or adequately answered your question.