Do you think someone from say 1432 would be able to tell which was newer out of a film from the 1950s (maybe East of Eden) and a brand new 'un (Bad Santa 2)? How about if you throw in some CGI/effects (King Kongs vs each other (yeah 70s one too, whatever, I don’t give a fuck)). How about music? Tempest or someone vs Human League vs Elvis vs George Fornby?
This is all without any prior knowledge (ie B&W is older).
Think on mother fuckers!