Pythagoras is a Greek philosopher, mathematician, and founder of the Pythagorean brotherhood. He was born in 570BC and died in 495BC. He was most famed for his theorem which is used today and is an important part of mathematical learning.
The website explained the theorem
This is my number one video, it is easy to understand and explains the theorem in a way that I know and gives me all the relevant information
This is my number two video, it's interesting and shows me the development of the theorem (Proof) but not as fun as the first one.
Number 3 for me, a good video but just a little boring and just the process of using the theorem.