[II ViRiZ II]

He uses this technique that Tass allows on CP where he uses both hands on the index keys, and hits the left and right keys jumptrilling. So he does the 16th trill normal, 32nd trill normal, and then hit's the 64th vibratrill as a 32nd jumptrill pretty much. [can't exactly explain it too clear, hope it makes sense]

So yeah, it's like double setup without having to double setup, so it's considered legit. Though of course it's trickier than using DS because it's not that easy to trill on the same keys due to having to let go of the keys before hitting it with your other hand, and on top of that it's kinda awkward trilling with one hand right above the other like that or whatever, and then comming out of the trill into the up+down jump and whatnot, yeah. If you bother to learn it, it's very helpful, personally, I'm too lazy.