I love, love, love these three videos. The first one is really sad, the second is hilarious, and the third is amazing and very thought provoking.
I have used the first video, "Ms. South Carolina" on the first day of class to introduce the importance of studying Geography (and public speech, for that matter).
I have not used the second video "What kind of Asian are you" yet, I just discovered it this summer, but when we learn about Asia, I teach a lesson about cultural awareness and stereotypes.
The final video, "The Single Story", I use in both my geography class and my psychology class to address stereotypes.