To answer your questions anon.
1) Yes, anyone can and should walk the maze, it's an interesting experience. In common with many ancient places, (although its antiquity isn't determined) it's not exactly overrun with tourists, it's very easy to miss and drive by, even when you're looking for it. I've been many times and only once encountered someone else there. Also, it's very well maintained by the owner.
2) Hardly, it's an amateur video made for that group's own record of their visit. It's not meant to be an accurate scientific appraisal of the site, nor was that ever suggested.
Something is not right. This message is just to keep things from messing up down the road