That Chuo Jiao material was indeed interesting. They were training as though the survival of their family was at stake, a throw back to the old days of inter-village conflict, something which my family during my father's time experienced, as my father being the eldest son had to be protected against being kidnapped because to the ancient Chinese, the eldest son was the most important person in the family.
To think that this is only one of perhaps hundreds of closed family systems scattered all over China yet to be discovered and shown to the world.
The only thing I found familiar there was the horse-stance with the heel raised. That was to build up an unbreakable / unsprainable ankle, something you would need to have to do that kind of kicking.
It must be a nightmare having to defend against someone who goes for your shin and ankle all the time, a part of your body farthest away from your defending hands and one hit was all it took to disable you, if your own shin and ankle was not equally conditioned. This accounts for the many one-legged crane stance found in many traditional Chinese Forms as this was the quickest way to get away from an ankle/shin attack. The only other system I know of and trained which goes for the ankle is one branch of Tan Tui.
The other thing was the lack of weight-resistance training, so they were not muscular but had valuable speed, power and conditioning to do damage.
It was cute to see the kids and one lady all dressed up in their finest for the video shoot.
I'll rather be happy than right, anytime.