Video on my security camera

An object travels in a straight line at a very high speed, not like an animal flying. I can only relate my impression to a bullet but I didn’t hear anyone shooting. The object came out of the woods of my backyard and traveled straight towards the front yard passing between the house and the shed at a height of 6-8 ft. I took the image on my iPhone from my tv screen and recorded it in real time and slow play. The object appears to be opaque and leaves a trace image of its trail. I’m guessing it traveled 50 feet in one second? I don’t know why the camera triggered and then happened to catch the image. The next camera in the direction it headed was not triggered to record but did capture the image of that area about 10 seconds before the moment that was recorded. The night before there was a light in the area that the object came from.