Fundamental Attribution Error
This video is something everyone should see. It is a very good first introduction to the Fundamental Attribution Error and related cognitive biases. He gives a good personal story at the end illustrating how this works (labeling people) and the implications (self-fulfilling prophecy, confirmation bias, and people suffering because of it).
By a professor at East Tennessee State U (Dr. Dula) but is not technical or too intellectual (as much as I like that sort of thing) but is down-to-earth and something everyone can understand. Very well done.
A good article on this:
The Fundamental Attribution Error: When People Underestimate Situational Factors