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The greatest impediment to wireless transmission of electricity is that the atmosphere is a poor conductor. At least as far as I understand it, which admittedly is lacking.

A microwave oven is a good example of wireless power transmission. The microwave RF is "received" by the water molecules that vibrate creating heat. It's a matter of transmitting RF and receiving it in a useful fashion that can be used in a conductor again to power lights or motors. There is an odd version of a "taser" that employs ultraviolet light to "ionize" the air path between the "weapon" and target. The high voltage of the taser can travel down the ionized air path. Successful operation is pretty difficult requiring nearly bare skin for each ultraviolet beam. Wires with darts are more reliable.

Air is a poor conductor for DC. AC is another story. Still not great, but shorter wavelengths conduct better.

Now, let’s also be careful. There’s a difference between transferring energy (like feeling the warmth of sunlight) and conducting electricity. There’s actually a strict result of electrodynamics that you “cannot” conduct electricity through electromagnetic radiation. Through the photoelectric effect you can cause a bound electron in a substance to become unbound. But that’s *not* conducting electricity. Which is part of the fast and loose pseudoscience of that whole article.

In the first video in the article I watched the guy who claimed he was lighting bulbs with electricity from his tree girdle that tree with a copper wire. I all bit guarantee that tree died. Total bs.