Simple Derivation of the Lorentz Factor (γ)

The Lorentz Factor is the factor by which time is dilated or length is contracted due to relativistic motion. It is commonly represented by the Greek letter Gamma (γ), and there is a surprisingly simple derivation for it. Of course, this derivation assumes some prior knowledge in basic special relativity, but if you didn't have that, you wouldn't be watching this video in the first place.