Watch the vid mate its all explained in there.
So you can't provide me with any sources. I expected that, but I gave you the opportunity openly and without any conditions.
Many things are "explained" in videos on the net. Some of them are true. Some of them are partly true. Some of them are biased interpretations of selected parts of pieces of truth. Some of them are lies. The fact that someone has made a video is not evidence that it is true.

