Fear and Love: The Story of The Exorcist
Starring Ellen Burstyn, Rick Baker, William Friedkin, William O'Malley, Eileen Dietz, Daniel Roebuck, Chris Newman, Roy Frumkes, Ron Faber, Anthony Timpone
It's a documentary and horror movie, and has a rating of 8.6 out of 10 from Imdb which is very high for this kind of movie.
Watch it here
Not found streaming from Brazil.