I only see one sentence before each video that has unique content on the pages. I ran the two URLs through this tool: http://www.webconfs.com/similar-page-checker.php and it reports 98% similarity. I'm guessing it's based entirely on text, which is likely what SEOmoz is based on.
The good news is that it's easy to fix. One video is 20 minutes long, and one video is 40 minutes long. Write at least a paragraph of good description about what the topic of each video is, and add that to the page.
Bonus points if you write more than one paragraph for each page, and 100x bonus points if you provide a transcription of the speech.
Once you do that the duplicate content error will go away, and you'll have better luck with getting traffic to those pages if that's a goal.