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I love how people discover old, hidden gems like this. Despite what we know about how people learn and modern tools like video resources, every once in a while, someone unearths some decades-old resource that explains things far better than what's available now.

It reminds me of when I was learning antenna theory and propagation. I was looking for something that started at step one. The best videos I found on YouTube were a series created in the 1950's by the Royal Canadian Air Force.

https://www.youtube.com/watch?v=7bDyA5t1ldU



A similar thing - the best explanation I've seen about how cars' differential steering works comes from 1937.

https://www.youtube.com/watch?v=yYAw79386WI


Similar: Mechanical computers (for fire control) https://www.youtube.com/watch?v=gwf5mAlI7Ug




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