Those fringe projects always start out enthusiastically and everything is built with videos and the rest, then 'silence' from the experimenter, usually because it didn't work. They seldom come back and say "well, we built this according to all those plans and couldn't make it work".
If the experimenter had understood what the real problems with the invention were, he would not have built the copy of the invention and the cool byproduct of the 'large home made toroid winder' would have never been engineered. At least he did a good job duplicating one of the 'generators'.
A few years ago a gentleman approached me wanting a broadband RF power amp to power something called a "Rife Tube". This supposedly killed germs when operated at precise RF frequencies with certain harmonics, etc. He required an RF source of a few hundred watts, be made using vacuum tubes, and have just one control to sweep the frequency over a decade or so. He said solid state would not work and the best explanation for why sounded like conspiracy-suppressed witch doctor voodoo to me. But what do I know.. It wasn't going to work for cheap that's certain, and there was no $ for the job, and when referred to the "certainly much cheaper than me building it" solution of using a VFO and some of the older tube products from companies who specialize broadband RF amps, there was another litany of reasons (beliefs, superstitions) why those wouldn't work. Oh well some people are so much smarter than I am.
No matter, the winder hints are what's important.
