Historical math videos of Lanczos from 1972.
The University of Manchester has uploaded some videos of Cornelius Lanczos the (re-)discoverer of the fast Fourier transform and singular value decomposition among other things. Recorded back in 1972, these videos discuss his life and mathematics. Worth taking a look.
Update: Manchester’s Nick Higham has written a more detailed blog post about these videos – http://nickhigham.wordpress.com/2013/02/06/the-lanczos-tapes/