Historic Videos
Google Video now features some historic movies from the National Archives & Records Administration (NARA) like the Apollo 11 documentary (pictured below), newsreels, and more. It has been a long time coming for content like this on the Internet. By necessity commercialism has thus far driven the growth of the 'Net and its related technologies but now costs are such that quality educational content is now available for free.
A warning to parents: It appears that Google doesn't filter content. An X-rated video was on the same page with a NASA video when I looked through the "popular" selections.