Xingu
Xingu is about the real-life Villas-Boas brothers who worked for over 25 years to create a homeland for the indigenous peoples of the Amazon.
Starring Felipe Camargo, Caio Blat, João Miguel, Maria Flor, Fábio Lago, Enrique Díaz, Luiz Paulo Vasconcellos, Augusto Madeira, Plínio Soares, Arthur Koll
Watch "Xingu" from streaming services Mubi, Fandor, Kanopy released in 2012. It's a drama and history movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.