As a drummer, I'm interested to see how the double kick pedal is set up. If you notice that his bass drum is set up in the middle, not offset like the usual bass drum would be in a double pedal set up.
I think he has his double pedal set up like this
https://goo.gl/images/TrCSCW and maybe done with a pearl pedal that is customized.
The curtains hiding the bottom of the kit are probably there to hide mic cables and remote hi-hat cables for a cleaner look.
He looks to have large floor toms and bass drums for floor toms along with a gong bass drum. A little more low end.
People have been critical of the cymbal height. If that's how he likes it then so be it.