Again, I see blocking with the left hand, then punching with the right. That's using two arms and it's not simultaneous.
That's what the video was supposed to show. The DC Jow Ga video shows the one arm blocking and striking, the arm is blocking and the hand is striking more specifically the fingers are striking the eyes.
But, this is a one-off technique. It doesn't allow for sustained attack with automatic protection like this.
Not everything has to be a sustained attack with the same technique. The longer you sustain an attack with the same technique, the better I'll be at countering it. If punch 1-2-3-4-5 is the same technique then 6 will most likely be the same. If punch 1-2-3-4, are the same then there is still good chance that 5 will be the same. The common sustained attack is usually no more than 4 punches. The brain starts to pick up patterns around 3 punches, so the 4th attack is usually something different. It is also common to see the 3rd attack vary as well. The more continuous number of punches at the top, the longer the lower part of the bottom is open to attacks.
If your hands are continuously in a combination punch aimed at my face then your mind isn't not aware of anything else but to punch my head. This mean I can attack low with little resistance. The longer you sustain such an attack the more you'll be at risk for tunnel vision.
Plus, the main issue is whether or not we're talking about a one-off technique, or a strategy and tactic that allows sustained attack with automatic protection in each arm.
I don't do sustained attacks. Everything I do is a "one off" because it prevents my opponent from understanding any pattern of attack that I may choose to do. For example, each number is a technique and each set is a combination of techniques. 1-2-3-4, 1-2-3-4, 1-2-3-4, 1-2-3-
? what is the next number. If your brain filled in 4 then you are right. Now try this. 1-4-2-2 , 2-1-2-3-3, 2-2-2-3, 4-2-3-1, 3-2-1-
?. Based on the combinations I threw, what does your brain think will come next after technique 1? How many of the people in the room will think different numbers? How many will think that I don't even have to throw a punch at all.
Did you even notice that one combination set was longer than the others? How long did it take you to figure it out.