Can't Believe They Had All Those Clips

Films like Casablanca and The Horn Blows at Midnight were never in public domain. It's a pretty safe bet that they never officially obtained clearances for any of the clips featured in this movie. Writer/director Harry Hurwitz was a part of the NYC film/art scene of that era, and doubtlessly considered all of the sampling "fair use." The DVD was issued in 2002, before the music and movie industries went thoroughly ballistic claiming ownership of everything, so it's doubtful clearances were attained for that release either... and since none of the films are credited and the director had been dead for nearly a decade, it would've been a nightmare trying to identify everything. And since the movie itself is now considered a work of art ("preserved by The Museum of Modern Art"), chances are good that none of the studios are gonna cause a fuss about this little-known film over 40 years later.