Samurai Headhunters
Starring Demetri Goritsas, Stephen Turnbull, Antony Cummins, Fumon Tanaka, Tsunehiro Kabaya, Shigeru Inoue, Chika Katou, Kazuya Tsurui, Yoshiro Murakami, Ryo Heitaku
It's a documentary and history movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Chile.