Measuring lateral runout with Bogi

Master mechanic Bogi, owner of 180° Automotive and co-host of All Girls Garage, demonstrates the correct way to measure lateral runout.

[amana]

What do I do if my gauge measures runout?

[cristymediana]

Lack of information.
How about the load of the dial and the lowest point?

[L-qf]

Good info but for a person whom already has an understanding. Need more detailed demo and graphic of lateral runout.
also, slides of causes and effects.