I only remember watching one for the Atari Jaguar. It was pushing the whole idea of "doing the math" and concluding that the Jaguar was the most powerful next gen system because it was supposedly 64-bit. It was absolutely AMAZING watching this preppy 90's archetypal dude-bro and token gamer girl (I believe there was a girl) trying to sell this fucking horrible POS system that no one at Atari even wanted. I ended up passing on a new Jaguar when they were being sold for only $20.00 at Kay*Bee Toys on the strength of that ad alone. Had I never seen it, I may have given in to curiosity and purchased one, but I was working offshore at the time and had tiny quarters with very limited space for consoles and games. If the Jaguar CD add-on were cheaper I probably would have bit.
I ended up getting one a year later for 20 bucks anyway, which I actually sent back to the vendor for a replacement unit because I didn't realize that the system doesn't power on without a cart in the slot. I'm sure I'm not the only person to do that.
BTW, I'm asking as a North American. I honestly don't know what the infomercial situation was/is in other regions. Every product or no products might have them overseas or all I know.