I found a solultion that works well for me: Flip4Mac. This is an add-in which allows you to use QuickTime to play this media. It also enables a plug-in for Safari for web content media. You may download a trial which plays half the video and then stops.
[robg adds: Dan Frakes covered Flip4Mac in a semi-recent MacGems article for Macworld, and he had good things to say about it as well.]
Update: As of January 2006, the basic Flip4Mac is now free; I've updated the title of the hint to reflect that...

