Watch Demystifying the Devil: Biography Marilyn Manson for Free: How to Stream the Movie Online at 123Movies. . This unauthorized documentary flashes back to the incarnation of Marilyn Manson and the Spooky Kids and chronicles their controversial trials and tribulations. Included are shocking, first-hand testimonials and outrageous home video from those who were closest to Brian Warner (a.k.a. Marilyn Manson) in his local band-based town of Ft. Lauderdale. This title carries a parental advisory.