In the first clip you clearly trace onto Lucy, not seeing them for 1 second as you kill them, you then proceed to kill their friend as soon as he crouches over to you with a knife out. In the second clip you know exactly where they are and peak the second guy through the wall before aiming onto him. In the third clip you visibly looked at the guy you had just killed and looted since his player-model appeared as he respawned (not visible to people not using vision assistance). Then finally for the 4th clip you look up at the guy and scroll as he comes to you, that was more of just an extra bit of content to go with all the other clips.