Continental Drift
Continents Adrift : An Introduction to Continental Drift and Plate Tectonics by Peter Matulavich for Rainbow Educational Media 28:05
Excellent. Uses an animated Earth and simple demonstrations to explain complex concepts.
Plate Tectonics by Michael Samartano 12:43
Very good explanation of Plate Tectonics
Tectonics of the Planet Earth by World Earthquakes Community 14:38
Very good introduction to Plate Tectonics
The Theory of Plate Tectonics by Sanjay Nath 16:26
Simple summary composite video
Sea-Floor Spreading Lecture by Renee Schreindl 6:53
Plate Boundaries With Hand Models by Renee Schreindl and students 1:51
These hand models are a very good way to remember the different types of plate boundaries and how they work.