It has been around before, but hey, if this gets a different audience....
The video didn't really add new info for me but then I've had a year to play with "four" Bisonics. There is a growl that happens in a hollow body but not in the solid and the difference can be dramatic to my ear. I found, especially with either variation on the Novak, that rolling off the volume makes a huge difference. At full volume there is so much going on that sometimes "muddy" is a good word. Roll it back and it clears up. The '67 Bisonic behaves similarly but the effect is not as dramatic with the Newark Street.