Sweet!... Thanks for actually looking into it :)
@Rob... It's a standard size adult hoop... 40 inch diameter.
Not that it matters, cause I'm going to beat it anyways, but I know hula hoops better than most, and those hoops are definitely taped together. You can even hear the tape crinkling as he hoops. I call shenanigans...
No, not expert, haha, but I do hoop-dance for fun. I'm about to try the watermelon one, the two person one is tough though... My friend (who is a hooper also) and I tried it to no avail, unless we use a giant hoop, which is against the rules. :(