We don't know who edited the video. The YouTube poster is named "RACISTWORLD". That suggests an agenda of some sort is in play, and not necessarily a pro-police one.
The missing video beginning at 04:24:20 when it restarts shows the cop walking from the trunk area of the car ,, WHERE THE VIDEO RECORDER IS LOCATED ... the youtube poster did not edit this ,, the cops at the scene deleted video or stopped recording.