Fats Waller's music is called stride which is very different from ragtime and much better IMO. The pianist is very good and adds some of his own stuff to the notated version of this piece. The overhead view is very distracting. Perhaps it was intended to showcase the constant left hand jumps in this style of music, but I think nothing justifies the camera angle, and I'd guess most people do not enjoy the overhead view.
I was wondering why this was even posted on the Piano Forum until I saw the box in the lower right corner.