Looking at the mechanics, the components and the context of this video what can we take away from it. Clearly the elbow strike has enormous potential, but is it only applicable as a pre emptive strike when the other person is not expecting it?

In a sporting context, elbow KO set up with deception, but here by faking a left knee:

Another street fight Elbow to the cheekbone, takes a bit to get it in, but when it lands it does knock the recipient unconscious.