Just change the number at the end of this URL to any value between 1 and 1801:
http://www.hulu.com/embed/1500 brings up an SNL sketch featuring Alec Baldwin as Tony Bennett (always funny).
http://www.hulu.com/embed/700 is an episode of The Mary Tyler Moore Show (dig that theme song).
and http://www.hulu.com/embed/1209 is an episode of Arrested Development.
Whether this is a glitch, lazy programming or intentional is irrelevant at this point, and I’m not going to be the one to call NBC or FOX for comment. So plug in a number and see what comes up!
Update: Could just be my Internet connection, but are the videos stopping part way through for anyone else?