The Thing Doesn’t Even Speak: Another fascinating youtube channel

Mathematical Visual Proofs is exactly what it says on the tin, a collection of videos (either with spoken voice or wordlessly with animation) explaining mathematical concepts from the basic to the complex.  They are incredibly clear and easy to follow.

A few samples worth watching:

Top Ten Epic Pythagorean Proofs Without Words

Factor a Sum of Two Cubes (visual proof without words)

Beautiful Geometry behind Geometric Series (8 dissection visual proofs without words)

But this is my current favourite:

Dividing a Circle into Seven Equal Areas (visual proof)