AVGN - Plumbers Don't Wear Ties -
AVGN - The Simpsons -
Excellent Adventures - w/Flash Metroid - (this continues for four more videos, all worth watching)
Excellent Adventures - w/Combofiend - (same deal here)
and for Nostalgia Critic/Chick I suggest just watching videos about movies you remember watching and are interested in:
http://thatguywiththeglasses.com/videolinks/thatguywiththeglasses/nostalgia-critic
http://thatguywiththeglasses.com/videolinks/team-nchick/nostalgia-chick