It's correct. The numbers won't match your back-of-the-envelope calculations because it's a tad more involved than you're assuming. Among other factors, there's additional time for the plane to debark and for passengers to make it to baggage claim. You don't want to arrive at the airport just as the plane is landing. Plus, I'm not sure how Sean edited that video together when he did the screen capture.

Props for noticing tho ;)