I think this in some way might be orchestrated or at least accepted by the Organisation. Think about it..there are hundreds of people dancing in that video......from Brooklyn, Patterson and Wallkill...there is no way such a video can be kept secret to the leadership of the Bethel.
By the way, it seem to be posted on a pro-JW channel at Youtube.
I wonder what they are up to? To show that JW are "normal people"?