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Some of the videos show what might be dust particles blowing past the camera which seems to have IR illumination. Those show up as small white spots which appear to travel very rapidly past the camera. Could be dust, sometimes rain mist, or from a sprinkler system. The slow moving objects appear to be floating on the breeze so it would help to say what time of year those images were recorded. Plant pollen perhaps, just floating by with the breeze. Sorry, nothing spooky about that.
No dust, no mist, the camera is mounted well out of the weather. Plant pollen, I doubt to form a perfect circle like that. The images were recorded of a period of at least 8 months. As I said in the OP, I had at least twice this many of these but got tired of downloading them.