How do I report cheaters and submit the video

I just played a match of capture the flag where the first minute of the game you couldn’t see but we were being killed, then the rest of the match I was getting shot through ledges, one shotted with a pistol, and so on and 4 guys in the same party were teleporting all over and getting kills.

Klick their GT press file complaint and from there select the reason for you reporting them, Cheating, Bad Profile Bio etc.