The delicate buzzes and trills on the snare interplay with dynamic hi-hats which mesh with the constant tap of the tambourine; what exactly is he playing on the hi-hats though?... it would be too uncomfortable to play the fast, delicate sixteenths with just the right hand...
The first time I heard this beat I thought it was so tasty, and then when I finally found out it was a Gadd beat I was so surprised, since I don't really like Gadd.
In the video he "forgets" to chip the hi-hat on one sometimes.