Good Math Videos by Others

Pascal's Triangle and Binomial Coefficients: http://www.youtube.com/watch?v=OMr9ZF1jgNc

A Pretty Cool Video about the Fibonacci Sequence and Golden Ratio, related to nature, building, aesthetics, etc. 

http://www.youtube.com/watch?v=2nAycC7sGVI

Check out this site (math doodles and more): http://www.youtube.com/user/Vihart

Great Patterns to learn math:  http://www.youtube.com/user/MisterNumbers