[fjarlq]

Tom M. Apostol's Project Mathematics videos circa 1988-2000 are wonderful:

https://en.wikipedia.org/wiki/Project_Mathematics!

https://www.youtube.com/watch?v=vpxWyJg4_1A&list=PL8_xPU5epJ...

[3abiton]

I remember seeing these videos on youtube long time ago, but couldn't remember the sources. Thanks for sharing!