Missiles burn up all of their propellant within the first few seconds of flight. Unless it was fired from a helicopter or drone directly above, which it was clearly not, you would see no smoke or vapor trail. Even sophisticated air to air missiles, ones used to take down fighter jets, burn through their propellant within seconds and glide to their target.
Missiles use a propulsion system, being combustion. Assume it would have to be fired from far away, if it were super sonic, which it would be, you would not see a vapor trail on a 240p security camera. Vapor trails with excellent optics are still hard to see. If it were a bomb it would not be super sonic and would show up as a black dot on one frame if you were extremely lucky. Sometimes the easiest answer is the correct answer.