What browser are you using to view the HTML pages? If it's IE and you're having problems, please try Firefox. Also, I think Peter's wrong about the version of QuickTime. The Mac and Windows version numbers are never in sync for QuickTime. QuickTime 7.1 is the newest for Windows. You can download and install it here.http://www.apple.com/support/downloads/quicktime71forwindows.html
Installing a new version of QuickTime might solve the issue, as this might correct the Active X control for QuickTime, which you might be missing. Though I'm no expert on this type of error on Windows.
Last, but not least. If you are still have problems running the movies in a browser...
You can create an iView catalog and import the movies.
1. File > Import from Files and Folders.
Choose the folder: Disk A or B > Content > Movies
Sort by File Name. And the movies should be in the correct order.
2. Move these two movies to the top. a_bridge_prefs, b_iview_prefs
You should begin with these, as they cover setup and preferences.
3. Double-click on any movie to view in Media View. Press spacebar to start/stop.