Without playing the game extensively I couldn't be sure but there is a couple of bits which look very cheaty where he is already lined up on people, while he could have guessed roughly where the other players were, before they appeared visually. But there was one bit where someone pinged behind a rock very briefly on the mini map which he then responded to but if he'd been using ESP/wallhack should have known they were there the first time he was shooting at people nearby... but the ability to combine engaging multiple enemy at the same time with very on target aim as reading the mini map to that level in that situation is a bit suspect.
One thing which doesn't help - spectator mode or recorded replays often use quite low frequency discrete game updates, sometimes even as low as 5-10 FPS, which can make it look a lot like someone snapped to a target or did a slick 180 instant turn to target when if you saw them actually playing it doesn't look as polished.
I spend a lot of time these days playing my Quake 2 RTX Horde mod, I just find most of the big FPS games now utterly meh to play let alone the average quality of player as a person