Uh, yes, you can indeed do it with purely physical movement, in fact that's exactly what Mr Mills is doing here. Look at the way he moves his feet, this moves the entire mass of his body forward as he strikes, adding a huge amount on energy (and where did you get the idea that energy isn't physi...
Title of the video says timing patterns, that means the lack of power is deliberate. It's a practice tool for building speed and teaching yourself to execute combos as one motion, you may as well criticize pushups for being an ineffective technique.
Uh, yes, you can indeed do it with purely physical movement, in fact that's exactly what Mr Mills is doing here. Look at the way he moves his feet, this moves the entire mass of his body forward as he strikes, adding a huge amount on energy (and where did you get the idea that energy isn't physi...