Folded Space has a great colleciton of links for video clips from Sesame Street.
Awesome.
From the site:
I state quite confidently that this is the best entry I’ve made in five years of weblogging. Go away if you have work things to get done. This is an enormous time-waster.
Below you’ll find a fantastic collection of Sesame Street video clips. These are great. I remember many of these from when I was a kid. I’ve tried to organzize them as best I can. If you know of more Muppet/Sesame Street clips, please let me know.
Just now, ’cause I’m such a HUGE sap, I teared up when I heard the a-b-c-COOKIEMONSTER! clip when Kermit storms off the set ’cause the little girl keeps saying “CookieMonster!” instead of the letter, and she replies with “I love you…” and then Kermit comes back and she gives him a kiss on the forehead.
And then there’s THIS:

June 11th, 2006 at 8:50 pm
Oh, Man! I have just laughed my ass off at the martians and the telephone!
June 11th, 2006 at 9:19 pm
Yeah, Ripley and I sat on the couch giggling our damn fool asses off at the aliens going “Cow… Cow… Cow…. mmmmMMMMMOOOOOO”