Very nice clip, new to me too, but I don't think there is any sound on this clip.
She's not a fetishist either Horatio, she posted this explanation as to why she made the video:
it is a research about my own phobia, tickles. I was trying during a period ( 2 weeks) don't feel afraid about it. Everyone tried to make me tickles during this days in different places, and i was trying to be relax and concentrate, but it's difficult to know when I am laughing and when i am afraid. There is a slim line between both