What I Learned from Movies
Here's an archive of over 1,200 'ephemeral films (advertising, industrial, educational, amateur). Topics range from beer to industrial theater to civil defense.
I parciularly recommend (because I just saw it today) The House in the Middle, which tells you how to survive nuclear war with good housekeeping and fresh paint.
My favorite line: This house burned 'as if it was deliberatly fired with kindling' as opposed to deliberatly fired with an ATOM BOMB!