This is a fun fan-made trailer that reimagines Ridley Scott's classic sci-fi noir film, Blade Runner, as a 1940s noir movie. The video was created by Chet Desmond, and this is what he had to say about it,
Blade Runner is already very "Noir." I just wanted to take those aspects of the film and accentuate them into something hopefully interesting. The piano song is "Memories of Green" off the soundtrack.
It definitely gives the film a really cool look.