I'm convinced by the evidence, on the first clip you peek in such a way where you are tracing the player before they appear. After you kill the player pushing you from the warehouse there seems to be some sort of aimlock onto the player named Zed through the walls which you try to hide but it messed up because you were desperate to kill the player stabbing you. The last kill on the clip shows you snapping very quickly to head height to get the headshots. I really do not think you were glancing back to check the backpack you just looted, on the video you aren't bothered about the backpack at all just looking straight at the wall as soon as the player starts respawning.