Diki,
I went back and watched again - it's as you say. I guess that's similar to Yamaha's Full Keyboard mode of fingering, which is pretty neat to use once in a while.
No doubt about it, he's a very talented player.
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.)