*Chaos: A Mathematical Adventure** (2010) and *Dimensions*** (2008) by Jos Leys, Étienne Ghys, Aurélien Alvarez, et al. are excellent, CC BY-NC-ND 3.0-licensed (i.e., free) movies about math.

*Chaos* introduces determinism vs. indeterminism, the butterfly effect, and Lorenz attractors. *Dimensions* does a very good job introducing stereographic projection, fourth dimensional geometry, complex numbers, fibrations, and proofs.

Both films are dubbed and subtitled in various languages.

^{*downloadable from Archive.org, HD720p torrent, or HD1080 torrent**on YouTube}