I don't understand the point of the talk. The only way you could follow what he was saying was if you understood the material he was trying to "explain".
I think someone wanting to learn about about the relation between pi, e, i, sine and cosine wouldn't be helped by this talk.
Totally agreed here. I understood it only because I literally lived with Euler's identity as a signal processing engineer for many years.. and even I started to lose him near the end when he was going at 100mph through some of the most crucial steps in the derivation, not necessarily because I didn't understand it, but just because he was going through the tricky steps too quickly.
I think someone wanting to learn about about the relation between pi, e, i, sine and cosine wouldn't be helped by this talk.