The only thing I saw that was missing was the sheet music - maybe he doesn't need it!
The style he used is the same as the one on my PSR-S950, same intro, etc. He was playing the keyboard in the Full Keyboard mode, which means he can trigger chords using just three fingers anywhere on the entire keyboard. Anything less than three fingers is just played as a note.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)