Interesting but not necessarily surprising.  I've seen some largely inexplicable results from my own patterning boards with certain loads in certain guns.  Enough to know that every one of them is a law unto itself.   

I find the video to be kind of a teaser that leaves me wanting more information than we are given - perhaps that is its purpose.  I've used Fiocchi buck shot loads in the past and find them to be kind of in the middle of the pack in terms of performance in my guns.  For some reason they pattern well in my doubles and less so in my semi-autos even when the barrels have the same nominal choke.  Go figure.    

Interesting video though - thanks for posting it.