I should add that the Defkalion press conference a while back showed several people associated with the company. I suppose that they could all be hired actors or something, but they’d have to know they were involved in a fraud. So I’m skeptical that such a stunt could be pulled off (and then repeated in subsequent videos and so forth) without something coming unglued sordid details start coming out.
HERE is a great example of just how sophisticated and involved a "long con" can be.
If Rossi is a con artist, he is nowhere near the most elaborate or sophisticated.