CCTV focussed at a point in the foreground is going to struggle.
Add to that the speed of the plane and the image is ALWAYS going to be poor
All the evidence including all the fireman, police, investigators and myriad of eyewitnesses as well as the black box and the bodies prove without a doubt it was the airliner not a missle.
Not to mention the radar data that clearly depicts the path for all but the last seconds of its journey.