My 80s TV set can Wirelessly Receive my PC's video signal. (No transmitter)

A shorter video about my small Hitachi TV that can receive the video signal from my PC wirelessly. Really weird but interesting. More information in the description below.
Wasn't really sure what to name the video.
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A copy of what I have discovered after making the video...
So after many hours of troubleshooting this is what I have figured out. The little Hitachi Tv can (sort of) receive video signals of devices plugged into wall power. The strongest of examples in this case was my pc where it could easily lock in the picture far even far away from it. I then tried a different graphics card which made the signal slightly weaker but still receivable. After messing with cables for a while I figured out that just plugging an adapter of some sort into my pc for video would create a signal my little tv could receive. After a while I thought I should try a different device and see if the same thing happens, so I tried a laptop. When turning on the laptop or even plugging in the laptop to charge there was no visible signal the tv could receive. Once I plug my laptop in to any external display I would then get a signal on my tiny tv. I also tried a nintendo switch and if it is docked and one I can get a video signal from it as well (it was more distorted though in comparison to the pc or laptop and could only get a signal a foot or less away from it.) Lastly I tried an Xbox and I could sort of get a signal from it but it seems that I would need more horizontal hold range in order to lock in the picture.

The main question is what the video signal is and I am stumped when it comes to that. It doesn't matter whether it is DP, VGA, HDMI, or DVI there is always a signal received by the small tv. So again the current conclusion is the Hitachi Tv can (sort of) receive video signals of devices that are plugged into wall power. I hope this is found useful. Thank you for watching the video and reading.