Probably using multihack wallhack or similar.
Players movement and aiming/recoil is very suspicious as you can see in the video:
Also stats is abnormal for a player who played just around 40 hours as you can see on battlelog profile.
https://battlelog.battlefield.com/bf4/user/QueMackleran/ https://battlelog.battlefield.com/bf4/servers/show/pc/fe48b654-e88c-4916-ad7d-bb5acd9e33c2/1-JAH-Warriors-Metro-Only-No-Weapon-Rules-64-Slots/ QueMackleran
https://battlelog.battlefield.com/bf4/user/QueMackleran/https://battlelog.battlefield.com/bf4/servers/show/pc/fe48b654-e88c-4916-ad7d-bb5acd9e33c2/1-JAH-Warriors-Metro-Only-No-Weapon-Rules-64-Slots/QueMackleranfull%20aim%20pls%20pls%20pls%20pls%20pls%20pls%20pls%20pls
QueMackleran
full aim pls pls pls pls pls pls pls pls