More "playing with hands", because the demo dummies aren't doing anything.
Because its a DEMO. Maul is teaching in these videos. So he is going slow and explaining things as he goes. In real application it is very fast.
No and no. Each time he circles the demo dummy's arm for no apparent reason, they are both just standing there.
Again, he is teaching as he goes. When you were learning Wing Chun, was everything shown at high speed and full intensity? And he is not circling the opponent's arm for no reason. The reason just may not be apparent to you. And you have to realize that Silat is a knife-based system. Even when empty-hand, the assumption is that the opponent has a knife. Some movements that seem like "chasing hands" to a Wing Chun guy against an unarmed opponent are meant to gain control of the attackers arm and therefore his weapon.
Neither the demo dummy's balance nor COG is affected until the follow up action,
Again, in real-time application the follow up action would be a split second after the entry. Like a Lop Da following a Bong Sao. Not much time for the opponent to do anything!
and the demonstrator isn't using movement or positioning to protect himself while just standing in front of an opponent who could... throw another punch!
Again, you are watching a teaching demo! Wasn't that clear in the video? Believe me he would be moving and positioning!
Someone who wants to do you harm with punches will not plant their feet in one spot and throw a single straight punch. They will barrel in punching continuously.
Ok. Believe whatever you want.
These nifty techniques only work against demo dummies who let you do it. I don't want to be overly critical of a system I have no experience with, but from others videos of him, my honest opinion is that it's just flowery bullsh!t.
Well, you have at least one thing right. You are being overly critical of a system you have no experience with!