Castle Films were noted for licensing 8mm versions of famous movies that were sold commercially. The only problem was that the films were basically very short versions of the original movies with absurdly brief running times. Still, this was hot stuff for collectors in in the era of pre-home video. What makes this 7 minute condensation of "Psycho" unusual is that the person who posted it on YouTube says it was from a 16mm version of the film, which would have been outside of Castle's 8mm line. Not sure what the intended audience was for this version since very few consumers had access to a 16mm projector. Still, whoever edited this version did a fairly admirable job of including most of the key elements. In any event, if you ever wanted to watch a movie masterpiece but had only 7 minutes to spare, your ship has come in!