Thanks to glen102 for this recipe.
Go to versiontracker.com and find MPlayer. You will have to use that to watch hi-res instead of QuickTime Player.
There's a problem with Internet Explorer and Media Player when accessing video on a password-protected site
Here's a fix published by Microsoft
Here's an older Microsoft explanation and suggested work-around for a similar propblem
An upgrade to your Media Player might fix it. Here's where you can get version 6.4:
Here's where you can get version 7
Here's where you can get version 9
Here's another work-around. Let the media player give you the error, THEN LEAVE IT OPEN -- do not close it -- and make the request again. The media player might play the video this time. Continue to leave it open and it will perhaps continue to work as expected.
Here's another fix. Let's suppose that you log on to your Windows each time it starts up with the username "bloggs". Use Windows explorer to find the file "bloggs.pwl" in the "windows" folder of drive C. If you delete that file, that tells Windows to forget *all* your passwords, so that means that ever password that's been filled in for you automatically, will have to be given again. So you shouldn't do this if there's some passwords that you need, but you don't have them written down someplace.
Another alternative is to re-install Internet Explorer.
Several Mac users have reported difficulty using Quicktime version 4 to play some of the MPGs on this site. One user has reported that this problem is fixed by using Quicktime version 5
Another possibility is to dispense with the player that you're currently using, and download the free Real Player from Real Networks.