In general, you may be right. But I for one appreciate being able to see it in action. The first video was patently useless - no live digs, no explanation of the machine. So in that case, you're definitely right. It seems to me that the only reason that one was made was to say, "look at me, I have this machine that no one else does". But the second video by Adventure Archaeology was exactly what I wanted to see. Showed some features of the machine and showed it in action, including what VDI's he was getting on various targets. I appreciate videos of that kind, even if it's from a "salesman" as you say.