Seems to be based on the Steinway B Home preset. He shows us the global edits starting at about 0:19, where he's renamed the preset to Steinway B Nice !! and soon after shows the Mics page. Some things I notice with a fast look at the edited version per the video:

The Inertia is raised to the maximum setting.
The Velocity curve is changed fairly dramatically, with the strongest possible strike reduced to the Forte level (!)
The Volume is raised, presumably to compensate for the reduction in the maximum possible velocity
The Dynamics setting is increased
Key release noise and Sustain pedal noise are both reduced
Seems to be using the default Steinway B Home mic arrangement, but with the Width increased a bit

My guess is that there are other edits to the reverb, etc. In any event, I do like the sound, after making a rough copy--reducing the maximum strike level and raising the volume make for a nice combination.

Pianoteq 6 shines here.

https://www.youtube.com/watch?v=IqI9Ch5iTQ4

(Found on the PianoWorld thread discussing PT6, by the way.)