At 1:06, there does appear to be something on the street in the location where the policeman in the red shirt eventually stands that wasn't there at 0:37.
The sound of shooting occurs at 0:50 into the video. Thirteen seconds later, there appears to be an object on the street near the shadow of the truck (seen more clearly in the snapshoot at 1:07. At 0:37, before the shooting, there was nothing at that location, which was a few feet from Scott’s body.