I recently came across an interesting YouTube channel containing lots of interesting footage from old archived documentaries. The clips on this channel generally cover the era from the early 1940s to the early 1970s- though some date from as early as 1907 while others are from 1981.
Link to YouTube Channel: wdtvlive42 – Archive Footage
Here are two interesting examples about two very diverse subjects. The first one is about nuclear thermal rockets– a concept that was successfully developed and extensively tested on the ground in the 1950s and 1960s. Sadly, it was never used to propel an actual spacecraft- manned or unmanned. The second one is classic cold-war hysteria about how communists want infiltrate USA and subvert capitalism, something that is oddly topical again.
Clip 1: Nuclear Thermal Rockets: Nuclear Propulsion in Space – 1968
Clip 2: Freedom And You: The Red Nightmare – 1957