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Congrats buddy and thanks paul. Thanks for the votes, dorrien andtyke (if I had 4, I've missed somebody!)
Thanks for the clips. The maths one reminded me of this book:
https://en.wikipedia.org/wiki/Uncle_Petros_and_Goldbach%27s_Conjecture

Congratulations, buddy!
Thanks to paul for hosting and major clips.
I've read that Uncle Petros book. Also John Derbyshire's Prime Obsession on the Riemann Hypothesis.
Grateful to those who voted for my clue.

Having watched the Tesla clip I can only say that almost anything sounds plausible if spoken in a British accent.