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Guro Billy Brown is a scam artist.
He is not actually trained nor has he learned any martial art style, he just makes lies and fake techniques up as he goes and runs with it.
There are many good schools around where you live, find one of them. Many schools have payment plans for people that have money issues, money is normally not an issue when attending a martial art school.
If you are determined to watch videos online and want a source you can learn real stuff from global ming chun academy is a great channel.
They are actually an official school and they can teach you something you can actually learn and use to defend yourself in a fight with.
Stay safe, do your research when taking info from people when it comes to anything but especially regarding fighting and martial arts.

(P.S. The screenshot is him cursing me out for calling him out when he tried to scam/mislead someone)
Thanks for reading my review, stay safe and stay happy!^_^