No,it's nonsense.
OK,you can read varying voltages around a room with a Digital Multimeter,but they are fairly random,& more due to the characteristics
of the meter & leads than anything else.
As far as is known, "voltages" of these levels are completely harmless.
If they were harmful,surely it would be even more harmful to earth yourself,so that the voltages will be reduced by the current flow through
your body.
To "isolate" yourself,you would have to wear a wire mesh suit,so the currents would flow on the outside of the suit.
He starts off talking about AC voltages due to the electricity supply,then halfway through says that his "earth" system works because of
the Earth's "natural negative charge".A negative charge would have no effect either way,on an AC signal.
Later he says that the "Dirty Electricity" is an" Electrostatic charge ".
Electrostatic charges have been around since the dawn of time,& have nothing to do with mains electrical supplies.
Towards the end,he starts talking about "Natural electrical nutrition" or something like that,which screams "Scam" to me.
By the way, did you see the large Electromagnetic field generator in the background?
I'm sitting in front of one too,as it's pretty cold tonight.
Yes! Wood fires generate heat,which is a form of Electromagnetic radiation!
VK6ZGO