Thank you Sparky, cgiles, Gunnar...
"If only listen and not see the video, I would never guessed that is an arranger used."
That's exactly why arranger keyboards should receive more attention from the keyboardist community. I've talked to many professional keyboardists and almost everybody believes arranger keyboards are really meant for beginners and hobbyists. For some reasons they think one finger mode and style player features are what these instruments are all about. They don't see them as features. A very common misconception! YouTube videos probably have to do with it. Even official videos do a real bad job showcasing the instrument sometimes.