I believe I came across that site a couple of years ago (still up now) and checked up (googled) on some facts (names) presented and came up with evidence of a scam.
Some other indications of a scam is the use of many words and fancy terms, and the mixing of different "phenomenons" and technologies.
Quote: "the Sun is positively charged with over 200 BILLION volts"
Sure, that number might be correct for all I know, but it's called static electricity down here.
Quote: "the Earth is charged with negative electricity - almost 4.5 megawatt hours"
In what time frame if I may ask? Watt seconds = Joules and is a fixed packet of energy, once spent it's gone. Continously available energy is measured in Watts.
And how do you intend getting a wire up in space to tap this supply of DC anyway? An antenna can only tap AC.
Quote: "most of this energy “bounces” off the Earth’s ionosphere and is lost in space"
Sure, it's called solar wind, and the small amount getting anywhere close to us shows itself as Aurora Borealis. It's still charged particles (DC).
The circuit in the video is real and useful enough, it's a Voltage quadrupler/rectifier hooked up to an antenna, and is otherwise known as a field strength meter.
You surely know that we are quite heavily surrounded by both mains and radio frequency electromagnetic fields, unless we take on a long hike in the mountains.
Notice how it charges 50uF from 1 to 1.6V in about 5 seconds. Task: how many Watts of power is required to do that? How long to charge the phone?
The phone uses software to detect charging. It took a long time for it to detect there was a couple of volts present.
Reckon that it takes just as long to detect the voltage is gone, but by then the video timely ends.
Task: Google the following names that were mentioned and see what comments & info you come up with..
Dean Schrock, Denver, Colorado
DERRICK Watlington, Chicago, Illinois
Susanne Wool, Chicago, Illinois
Rudy Uvalle, Miami, Florida
Iirc. they're all fictious, and the generator in the book is not related to cosmic energy, it's a rotating device from one of those crazy (can't work) patents (freely available).