I haven't seen a decent video from that country yet and I doubt I ever will.
I think the only chance we have at this one is to build a known-good test bed and keep trying different coil configurations until one of them works. Anyone serious about this project needs to get their circuit board built and checked-out, then get about a dozen similar cores and start a plug-n-test operation on them all. Even if you get lucky and one of the transformers happen to work, no one has any for-sure idea how it works, so replications of a working core need to be built with tiny modifications to figure out what is important. Only then do we have a snowball's chance in hell of understanding it well enough to scale it up.
By the way, there is one report of a replication that ran for two days and quit. When examined, the core had come apart like it was smashed with a hammer. Apparently he super-glued it back together and it ran for two more days, after which it literally blew apart. So whatever is going on inside that transformer isn't entirely electrical in nature; there's a vibration happening within the ferrite, some may call it a standing wave. Whatever it is and however it comes to being, that appears to be the secret within this device. The electronics do nothing more than setup the conditions for this effect while harvesting off a small portion of electrical energy. It's also entirely possible that without the internal hammering effect that destroys the ferrite core, no usable energy can be obtained. I hope that's not the case, but we certainly don't know yet.