A small typo on the text next to the tree diagram: “the probability of rolling a 5 with the Red die and a 2 with the Blue die is 5/6 x 1/2 = 5/12” should be:”the probability of rolling a 3 with the Red die and a 2 with the Blue die is 5/6 x 1/2 = 5/12”.

James is great for explaining these kinds of topics, especially with his enthusiasm and way of talking to the camera, something that is true for other Numberphile hosts/presenters. Definitely go check out https://www.youtube.com/numberphile and https://www.numberphile.com/