So, I was looking through the Prelinger Video Archives collection of 1940 through 1960's "Social Guidance" and other educational films. While most are good today only for a laugh, there are some relevant even today. (I'd like the Bush White House to all be tied to their seats to watch the cautionary piece on "Despotism.") Most films are downloadable in several video formats.
However, I was a bit disconcerted at the message I found when I checked the listing for "Censorship: A Question of Judgement?":
<http://www.archive.org/movies/details-db.php?collection=prelinger&collecti onid=19437>
"This movie is currently unavailable for download because it cannot be located on our servers. We apologize for the inconvenience and hope to have access to this movie restored as soon as possible."