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by BlueTemplar 621 days ago
Interactive examples using Macromedia Flash or Java applets are straight in the "a decade or two" time frame.

(The 3B1B one is of course also among the best :

https://eater.net/quaternions )

And, while it was before my time, universities might have had some before the World Wide Web ?

Video has been around for much longer than that too.

I'm also not sure why "high production values" is supposed to matter, aren't Feynman's video lectures good enough for you ?