For those who don't know 3blue1brown:

https://www.youtube.com/watch?v=NaL_Cb42WyY

If your are a Tau person, try four ln(i)/i …

Very nice video. Thanks for sharing.

What is 3blue1brown, who is the speaker, and what is your connections to all of this? Just curious….

If you want to know more and look at another great Pi video, check this:

http://wastlund.blogspot.fr/2018/03/infinite-lake-surrounded-by-lighthouses.html from the guy who found part of the nice solution to the difficult prisoners hat problem (where if more than 50% of them guess the colour of their own hat they all get free). And a short explanation (on the name and stuff) here: http://www.3blue1brown.com/about/

I'm just a math fan, if you are interested in Riemann hypothesis, the best one for me and cool animation on analytic continuation is this one:

https://www.youtube.com/watch?v=sD0NjbwqlYw

On a sadder note, Stephen Hawking passed away on this Pi day. Here ten years ago flying in zero-gravity: https://www.youtube.com/watch?v=OhIpdSZQZlI