Cute. I'm inclined to believe this is just some clickbait bullshit. "Electrosmog" is a term often used by people who believe that cell phones cause cancer or conspiracy theorists. I can't find any real science to back it up.
Putting that aside, let's reason about this "resonator" presented in the vid. It appears to produce a uniform current in the circuit, so long as the "resonator's" orientation doesn't change. If the orientation should change, the current changes and the brightness of the bulb is affected. But isn't that a little strange? That would suggest that the "electrosmog" is uniform.
Electrosmog is the invisible electromagnetic radiation resulting from the use of both wireless technology and mains electricity. The most common sources of wireless electrosmog are: Cordless phones Cordless baby alarms Mobile/cellular phone masts/towers/transmitters Mobile/cellular phones Wireless networks
"Electrosmog" should not be uniform at all. Cell phones and wireless network signals are constantly changing. There is no continuous flow of data between your phone and the cell tower. Even if you are exchanging data, it's not going to be uniform. Now he did go out into an open, empty area in the second part of the vid. But in that case the signals would be much weaker than a dense urban environment. The bulb should be dimmer and it doesn't really appear to be. Probably shouldn't be able to see much with the sun still out either.
Seems like bunk to me.