Some comments on the witnesses and their videos...
Brady's is the earliest video, note the LE SUV next to the body when the video starts. Car parks diagonally to the east of Brown's body and that car is shown in that spot in the rest of the photos and videos. My guess is the SUV next to the body was the second responder, the two cops in Brady's video and Piaget's newer video are Wilson and the first responder.
Wilson was cleared from the sick call at 12:00:00. Disturbance call from shooting was time stamped 12:01:50. Wilson likely took one minute to get from Glenark to 2947 Canfield, a trip of a half mile. Thus, this incident took place over the course of 50 seconds or less from start to finish. First responder on scene after Wilson was at 12:02:22, I think that is the cop on foot in Brady's video. According to the event report from the document dump, the second responder arrived on scene at 12:10:29. If the SUV next to the body was the second responder at 12:10, then Brady's video is 8-9 minutes after the shooting, Piaget's videos are later than that, as is Black Canseco's.
So, Brady's video might be the earliest one, but I question why it took two witnesses who saw the tussle (note everyone seems to call it the same thing...maybe tussle is a uber common term in the black community) and the shooting to eight minutes to video the scene. I have no idea what they saw, but based on what I see out of the data available to us, I doubt any saw the shooting or the tussle. One more note...is that Tiffany Mitchell walking on the sidewalk talking on the phone in Brady's video? LOL
Note: You know the area where Black Canseco shot his video from. That's a driveway to more apartments, Dorian Johnson lives literally a football field from where Black Canseco was standing. Think Dorian and Piaget know each other by chance? In the least, think any of these witnesses overheard one another talking in the street afterwards?