Misleading that she can stick her hand in the water with a running hairdryer. She has the water in a plastic container, has a non conductive countertop, and though we don't know what she is standing on, very possibly is not a conductive surface either. Do the same thing standing barefooted on concrete that is on grade and risk of shock increases quite a bit.
I watch the video as well... I got a chuckle out of the rotating red light. That hair dryer does not have an LCDI plug on it, and is not plugged into a GFCI outlet, though it may be protected further down.
Cool parlor trick, however it ignores real world conditions, like the aforementioned insulated or isolated body of water, or her placing her body in series with a grounded object.
If static electricity, or something like reflexive action from carpal tunnel or nerve damage shocks can be or have been eliminated, it's time to throw the hair dryer in the trash and get a new one, and If the GFCI is more than about 15 years old I would replace that as well. The lcdi plug on the dryer is doing its job.
If the bathroom is slam full of steam after a shower, the exhaust fan could probably stand to be replaced or at least cleaned. The guts for many of those Broan and Nu-tone aren't much more than a decent GFCI receptacle and are readily stocked in Lowe's and Home Depot.
