Best I can tell is he's playing 1/4 notes with the right hand on HH or ride. Left hand on the snare is playing a shuffle....1 & 2 & 3 & 4 &...accents on the back beat......ghost notes 1 &, &3 &. Also accents periodically throughout on &2, &4. Then he throws in a bunch of triplet fills for good measure.
After having said all of that.......it's basically a shuffle variation I think.
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