Those could just be lens flare due to a bright light source casting light into the lens (the light source may be out of frame). To be sure, you'd need to set up a ladder in front of that cam and do some physical experimentation. If you shine a flashlight into the lenses and see dust spots, then they're dust spots. If you move the camera and the spots stay in a fixed position, then they're probably dust spots. If the white spots move as you aim the camera different directions, then they're just lens flare.