I agree the information is all out there... The only in general thing I can say to counter a sophisticated attack is to be situationally aware and use lawful force in a manner to aggressively defend yourself.. I stumble for better words but the key is lawful use of force... no Rambo... think reasonable man...
Hesitation, timidness have no place in these situations but neither can you afford errors or mis-identification... I have no Idea of what to think of these videos overall..