This is an old How to be a Spy psa, because that makes a lot of sense :p (you would think this is secret). It includes the regular narrator for PSAs of the time, with a person that does the wrong stuff and someone who does the right stuff.
It acts more like one of the simpler PSAs throughout which makes the mood of the movie not as it should be. It has poltential to be hilarious.
http://www.imdb.com/title/tt0274560/
http://www.videodownload.cc/youtube/john-ford-s-undercover-how-to-operate-behind-enemy-lines-in-world-war-2-1943