45 Days In Harbar
Artist Cesar Arechiga sets up a studio in a maximum-security Mexican prison, teaching the inmates the skills behind art. In Spanish with subtitles.
Starring César Aréchiga, Willy Zavala
It's a documentary movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from United States.