Train Hard - Stay Humble
"The object of parkour is to get from one place to another in the most efficient way possible using only the human body and the objects in the environment"...
This vid got a bit of fire online because it would depict "too much" running; well I think that was EXACTLY the point.
For more literal parkour check Parkour Literally 1,
Parkour Literally 2,
Parkour Literally 3,
Parkour Literally 4, and
Tomber or not tomber.