10:17

Six axis racks

5:25

Screw gears (crossed helical gears) | hyperboloid gears | hypoid gears | screw bevel gears

9:42

How the portal illusion works

9:28

I Put 44 Mechanisms In 1 LEGO® Machine...

4:33

Scissors NOT gate

9:05

Wild knots

55:10

Kuzey Kore Tatilim: Dünyanın En Komik / En Kötü Yeri?

9:37

How these impossibly thin cuts are made