Looking for a particular lecture/lecturer on the fact that intuition may is not always enough

Question

Last night I was about to close off my phone and saw the beginning of a very interesting lecture on how intuition is not always enough in Mathematics...

The lectures (so far unknown to me) started out showing that the regions of a circle cut-off by n-lines follow a rather non-intuitive pattern

1, 2, 4, 8, 16 ... 

and then continues unexpected with ... 31, 57, ... Wikipedia reference.

And then it looked like he was going to talk about another famous problem, the Borwein Integrals:

and I kinda could see it showing up in the slides, when I could not hold my jet-lag and fell asleep. Being such a privacy freak I had History turned off on the phone, it lost power, rebooted and this morning I was not able to locate it among my Android Discover cards.

I would love to be able to watch the entire lecture.

Does anyone here know the lecture/lecturer? He is skinny, has sort of a french accent and the video was recorded with the left half fixed on the slides and him moving on the right half of the screen. Do you know of any of the Math. institutes that records videos in this particular fashion?

Answer 1

Maybe E. Trizac - When random walkers help solve intriguing integrals?

Answer 2

The Most Misleading Patterns in Mathematics | This is Why We Need Proofs

This video doesn't match the description in the last paragraph of the question, but it does start with $1,2,4,8,16,31$ and the Borwein integrals, and it is about intuition not always being enough.