Fine Structure

The Mechanical Universe

The Mechanical Universe is a great (albeit really, really old) series of videos from what looks like an intro to physics class at Caltech in 1985. The entire 52-part series is legitimately available on Google video as well as purchasable on DVD! While most of the videos explain basic topics without emphasis on math, they're incredibly visual and conceptual. I literally have not seen a better quality physics video and this series is 22 years old.

Here's a good one: #42, The Lorentz Transformation: