This one is full of mathematical IDENTITIES; that is, phi, pi and e are here, as is the square root of 2, infinite fractions, some types of algebra equations wi

This one is full of mathematical IDENTITIES; that is, phi, pi and e are here, as is the square root of 2, infinite fractions, some types of algebra equations with x and y, Pell's equation, how some types of algebra equations have an infinite fraction equivalent (and this equivalent as expressed in counts of blocks on 2D graph paper), and Euclid's Algorithm. It's quite the mathematical mash-up! Well worth watching again in the future!