Un secreto en la caja
Starring Alfredo Espinoza, Yolanda Acosta, Antonio Ordoñez, José Ignacio Donoso, Amaia Merino, Christoph Baumann, Randi Krarup, Ángel Gavilanes
It's a documentary and biography movie, and has a rating of 7 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Mexico.