Ahh, a patent issue. Great ideas are great to patent if they can be enforced. This one, not so much as people can buy stock parts to do themselves..

I would nicely ask the gentleman for his full name, address and the patent number. If it's ligit, i'd take down the video. Don't know if there are any law dogs here, but I'd prolly take it down even if it's patent pending. In your informational request, let him know you plan to oblige his wishes once the patent is confirmed. This could help if the dude is weird and goes after you for having a vid out there two days longer than he thinks you should. Suits may be the only way this guy will make anything at all off this.