Thanks to Hannah Edwards of LearnStuff.com for pointing out a bad link in a post containing a video from Comedy Central's The Colbert Report.
The clip itself displays correctly; the error was in the code of the html "border" Comedy Central wrapped around the video. When Comedy Central redesigned its assorted sites a while back, it somehow mananged to properly retain the links to thousands of videos files, but screwed up the URLs to its main pages.
This isn't a problem any more- I routinely remove any extraneous material around the videos I embed here, and I also fix dead links on old pages whenever I encounter them. But with 1,900 pages dating back a decade or more, I really don't go looking for them. Thus, I'm appreciative when someone takes the time to point them out.
You can check out LearnStuff.com's article on The Colbert Report here.