User ID 2832660339203669481
https://youtu.be/P2GUQBPuJfc
as you can see from the video, he kills by standing behind objects and at a certain point he looks for enemies, aims and kills completely hidden behind an object or a wall, only 4 kills because he entered and left the game several times
It's a spectator bug. He wasn't actually shooting through the box. He was peeking above it.