Charles and Ray Eames produced 5 excellent maths videos as well as other videos that are still useful today.

Eratosthenes shows how to measure the circumference of the earth.

Powers of 10 is their best known film. For much more see the blog Powers and Scale.

Something about Functions gives a basic idea of a function.

Symmetry explains fitting a cube in a box.

Topology is a film introducing topology.

In addition Babbage and A Computer Glossary offer insights into computing as perceived in the 1960s and 1970s, both extremely useful for anyone interested in programming.

Further info can be found at the Eames Office website.