I wanna say, not to throw a bucket of water any paranormal possibilities - I’m only theorising, that it’s water droplets possibly refreezing. The footage seems to flash out just before the anomalies form, could that be a blanket of snow falling from a higher structure and then some molten drips landing on the lens just after? I don’t know how cold it gets out there if it’s possible the drips crystalized quickly giving this strange reflective quality as the ice molecules spread. Also, the camera says “air conditioning” on it. I presume that’s where it’s located. Is it directly below an air con unit that might be leaking or thawing the snow that’s landed on it?