Can't advise on the video I'm afraid, but that is a very fun way to start to mess someone up. Some years ago in a private session Susie, in a very smart black pencil skirt suit over black underwear and black tights, found herself, still clean, lying on her back in the paddling pool with her legs against the pool side, pointing up, so she was effectively presenting an upside down upskirt. Rosemary promptly grabbed the opportunity and emptied a full carton of custard into Susie's skirt between her legs, so she then had nice sloppy, soggy underwear beneath her, still clean outside, smart skirt.
We really should include something like that in a future video scene.