To be honest, I am completely lost as for which parts you are talking about and what outer edges do you mean. Maybe something like timing into the piece or measure numbers would be helpfull.
haha cmon man, you know, that twaa..twaa part
.... heh

I think pianistimo is talking about parts in 0:36 to 1:16, and wants you to increase in intensity as you go higher and higher, so when you get to the highest notes, the sound is very bright and like fireworks. and then these fireworks stay on for a while
I think you could experiment with this idea. from 1:06 to 1:16, when the left hand is playing the chords, play them more solidly, and more softly than the right hand. In other words, try to think of the left hand chord just as it is written - as the first note in a group of 5.
As for the right hand, slow it down a teensy bit, to appreciate the tension between the notes, and get louder and brighter as your arm moves from left to right. When I do it, I try to really grip the keys and rip them out of the keyboard