That is a forthcoming Jonathan Amith documentary on Nahua culture in the Rio Balsas region of Mexico. The trailer video is here; it is set in San Agustin Oapan, where I did the field work for my book Markets and Cultural Voices. Recently I saw the film at National Geographic and loved it, admittedly it is not for all tastes. I’ll let you all know when a DVD becomes available.
A brief description of the film is here.