I’ve previously shared a list of audio and video recordings of Foucault, and I won’t repeat things here. But there are a few pieces of documentary evidence about Foucault’s work and crime and prisons which are full-length films.
There was also another film, Je suis Pierre Rivière, directed by Christine Lipinska from the same year, though I’ve never seen this and am unable to track down a copy. If anyone can help, please let me know.
There is a recent film which I’ve mentioned here before, Sur les toits, directed by Nicolas Drolc. This looks at the prison riots in 1971-72 in France, and contains documentary footage of Foucault, as well as contemporary interviews with people including Daniel Defert and Serge Livrozet.
I’ve also recently found on Vimeo Les Prisons aussi, a 1973 Group d’Information sur les prisons film directed by René Lefort. It was only uploaded in full ten months ago. The link below will take you to the Vimeo page for the film.
Finally, there is Foucault, par lui-même, directed by Philippe Calderon with the assistance of François Ewald.