The techniques are mostly useless.
Why is the instructor holding the firearm ?
Why not have the student hold the weapon while the instructor shows and talks through the technique,since the student had NO clue ?
The instructor was looking past the student, apparently reading his description as he went through the technique because he, the instructor, had NO Clue as to how or what he was doing.
I am sure though that since it is on you tube and is a Chinese guy doing wing chun,(Bruce Lee's base Art),many will believe it works and will train it as reality.