Here are some thoughts.
- Palm strikes that he talks about = Martial artist hit with the palm but not in the same motion as a jab. Palm strikes the way he shows are not as efficient.
- Palm strikes + Raking fingers across the eyes = Kung Fu tiger claw all day. Tiger claw does upward strikes to the chin because the head has limited vertical evasion capabilities. If you vertically bend your head back too far then you are making yourself blind in that you won't be able to see your opponent. People can "roll with" horizontal punches, but not so much with upward strikes.
- Using the Forearms to smash = Kung fu all day long.
- The upper cut = Hung Gar, Choy Ga, Choy li fut and most likely other long fist styles. Again the way that hes doing them in the video is probably not the way that they were actually being thrown.
- Block a punch and give a back fist = the block is found in Martial arts and so is the backfist.
I think the reason why his techniques for bare knuckle are bad is because he read about it and didn't have any visuals on how it was done. And if he did, then the person who read the book didn't have any visuals on how it was actually some. Someone says do an uppercut using the palm and that's what they thought of because they are boxers, but if they would step out of the box a little then they would have come across a better way to do this. Had he been thinking of this as fighting and not "formal boxing" then he would have likely stumbled across the right way to do the punches he was talking about.
As for the effectiveness of these. Yes they are all effective but not the way that he was showing. You may have noticed that he was using modern boxing movement with old boxing techniques and it's not going to work that way.
The other thing is that so many people are so afraid of breaking the hand on the skull. There are soft areas on the face and the head that you can hit without worrying about breaking your hand on someone's head. This fear baffles me, because if I was worried about breaking my hand on someone's head then I would just find a better way to hit the head and I would find which areas on the head can I hit to minimize me breaking my hand. Punches should always be targeted and not something that you throw out with the only purpose of randomly hitting somewhere on the head.