1min he cant find where im

but he can shoot advance（提前枪）XD

i think he is wall hakcer/perspective（透视）

Besides the fact that a video from your perspective can seldom be used as evidence, the video shows no evidence of using ESP.

Your teammate has fired several times at your position before, so clearly he knows that the underpath has been breached by your team.

Pre-aiming where you are hiding (which is a very common place to hide as well) while going down the stair is just normal game sense.