The power lines and cable lines are pole mounted about 20 feet high.
The telephone lines are underground.
I have noticed this many times when it is dark. Last time I noticed it, I walked to the spot, holding my iPad and watching the feed. I stepped right into the middle of the anomaly and didn’t see or feel anything in the grass.
The v3 is about 35 feet away, and the image is zoomed.
Move the cam. Does the spot move? Perhaps there more on clear nights with lots of moonlight? Might be a lens flare or something microscopic on the lens.