There are a lot of old training videos on Youtube, of which https://youtu.be/uFjVWlyv6lU
is a representative sample. These are films made by private companies (this one GM), or the military, or some other organization, which, in most of the examples I've found, clearly describe some aspect of technology. These videos are also a common feature of Hackaday's "Retrotechtacular" http://hackaday.com/category/hackaday-columns/retrotechtacular-hackaday-columns/
One common refrain from folks seeing these videos is that they don't make videos like this any more, and they ought to from an educational standpoint. These videos are almost universally heralded as better than educational videos of today.
I wonder how much of that is survival bias? Bad army training video from 60 years ago may have been much more plentiful than good ones, but few people are going to put that video on YouTube, and the ones which do get YouTubed are not going to get linked and shared (unless they are MST3K bad).