Watch The AGFA Horror Trailer Show for Free: How to Stream the Movie Online at 123Movies. . Unleashed from the dungeon of AGFA (the American Genre Film Archive), these are the most spine-ripping, slime-slinging, soul-shredding horror trailers in our arsenal. Meticulously constructed by AGFA's mad scientists to resemble an otherworldly night at the movies under the stars, this mix features a plethora of material unseen since the films' original releases.