I need a barf bag just watching this. And I flew 737 Classics into one of the worlds windiest/most turbulent places. Don't recall any overworking like this.

Hmmm. Well he seemed to be enjoying himself!
There's a reference to max gust in his FB post, unless I misunderstand him. That must be an operator thing. Boeing only specify max steady component.
(Let's not get started on Demonstrated vs Limit...).

Pilot induced oscillations!

I thought that was something you did on the runway?

Pilot Shows Skill in Landing 737 in High Winds
 

https://www.youtube.com/watch?v=3hMmafsWbEI

On Facebook, Kielak, who's from Poland, explained: "I'm always saying that airline pilot gets his all salary for one landing per month...this is the day I earned mine...maximum crosswind limit steady, gust plus steady and gust in one...FULL FORCE column deflections was reqired [sic]...I LOVE Boeing 737 for it's stability in severe conditions."