This video is crazy.
I believe what you are seeing fly at the camera is the bark from the tree. I've seen a few trees that have been hit by lightning and as the pulse travels through the tree and down the trunk, it blows the bark to pieces. Trees aren't good conductors, so the passing of this much electricity through them is a rather traumatic event. This is why you don't stand under trees in a rainstorm. Lucky dude there.