I remember the first time I was in Santa Monica and heard the song played during Hanukkah. It was a joy and hilarious. Here's the original version, nicely edited with visuals by the person posting it --
This is fun, especially-animated version performed to the great surprise and pleasure of the audience by the Gay Men's Chorus of Los Angeles.
And finally, this is the most enthusiastic and perhaps most-appropriate version of the song from the Klezmer group, Art of Time -- even if singer David Wall twice screws up the same word and blows one of Lehrer's over-the-top rhymes.