To add, there is something about those old 40s and 50s era technical films like you linked that is just so... I don't what exactly it is, but I find them fascinating and genuinely informative, even though they are explaining tech that is decades obsolete.
It's pretty awesome that they are still available 70+ years later in excellent quality!
I legit can't tell if you're being sarcastic or not, because it perfectly encapsulates the weird way america is so blase about depictions of graphic, gleeful violence while simultaneously being horrified at seeing a nipple.on tv.