Was the person who told you it was illegal possibly one of those tree stump lawyers? They usually know everything but the law.

If your video is illegal, would it not also be illegal to post videos of people catching fish, shooting carp, etc.? I don't see a problem as long as you are not profiting through the mfgrs. brand by selling the video.

IMO, that person is jealous that you thought of the idea first. Slap him and the horse he rode into town on.