Short physics demonstration videos
"This online collection provides a wide range of short physics demonstration videos. The videos are designed to help students visualize the physical principles of common physical systems and experiments. Topics include motion, waves, electricity and magnetism, collisions, thermodynamics, and fluid dynamics. The videos are 1-4 minutes in length with brief text information about the demonstration, equipment, and physical concepts illustrated. They may be viewed in a browser or downloaded.
===========