I don't think it's CCTV, I assume it's a webcam? They're everywhere these days, amusement parks, beaches, on peers, in town centres etc etc.
That was probably a kalibr cruise missile. If it utilised it's maximum capable terminal velocity, then it'd have been doing around mach 2.5. It may have been travelling much slower. Mach 2.5 is 850m/s, so to catch it every 50m or so the camera would need a frame rate of less than 20 frames/s. That's not high spec to my knowledge.
That square is allegedly some culturally significant site and that building is a government building. I don't think i