Why do mirrors flip horizontally (but not vertically)?

The video explores why mirrors appear to flip images horizontally but not vertically. It explains that the perceived horizontal flip is due to how we present objects to the mirror, not the mirror itself. The video discusses the concept of flipping in the z direction, which is responsible for the confusion. It also highlights how our daily experiences and symmetry affect our perception of mirror images.

What new insight or understanding did you gain from this video?