I watched that first video and then saw to my horror that there seem to be five in all. I wasn't willing to invest that amount of time in it.
In a nutshell — hee hee — I assume the idea is that if you are suffering from some chronic-type pain in the body, and you ground yourself (holding onto a metal cold water tap would do just fine if you don't happen to have a thick copper rod to drive into the earth or a lightning conductor handy), then the pain will reduce or go away.
I don't see this as impossible. I remember doing a "Touch for Health" procedure on someone (a co-worker) who had had fairly severe abdominal pain for some days. The procedure involved tracing along the nearest body meridian to the site of the pain, rubbing tentatively at different points up and down it, and any that were tender rubbing (gently) until the pain had gone. In this way, the pain sort of transferred to different points along the meridian, and was dissipated. It took about 45 minutes. At the end, the initial abdominal pain had gone. I spoke with the guy a week later, and he said it hadn't come back. I cautioned him at the time that the pain might be an indicator of appendicitis or something, and just because the pain had gone it didn't mean some underlying malfunction had righted itself, but I didn't hear any more about it.
Anyway, the point is, try it and see. If you've got some chronic pain, grab hold of a cold water tap for an hour. I guess you could run a wire from the tap to the couch when you're watching TV if you want. There could well be some truth in the idea, even if it isn't mainstream science.
I haven't investigated these guys or the techniques, although I have come across grounding oneself before, and not only through Hubbard. They won't make any money out of telling people to do something like I just said. I suppose they have some nifty little doodads they sell at exhorbitant prices that supposedly enhance the effect in some way, or guard against dangers of some kind, which may or may not have some basis in truth. Although looking at the second presenter in that video, who looks like he deals coke for a living, I would suspect a scam.
Paul