Dang, I do a search for "wetting" since last visit and it's this pathetic little clip again??
I find it interesting that on a board dedicated to tickling rather than peeing, the clip from that video that keeps making the round is just what the pee-fetish folks would consider the "money shot". The actual wetting is preceded by a very long interval of very very good tickle-torture. And lots of squirming and "please stop, you're going to make me wet my pants", from a victim just barely able to talk from being tickled so effectively.
Me, I'm a hybrid-fetishist, more oriented towards wetting than tickling but the real spike of interest is definitely at the intersection. But the buildup, the long tickling, the prolonged & increasing helplessness, and increasing loss of control, is what makes it. Just watching someone giggle and wet (in a clip that only shows from waist to knees, no less) isn't much for me either. But the video vignette from which it was lifted is totally worth acquiring even if you care not for the actual urination.
Oh, and nothing fishy, aside from the participant drinking copious fluids and the filming arranged to catch when she was ready and able to cut loose (i.e., it's not something that "just happened" during the course of filming a tickling, it was totally intended).