I watched the demo, Player was multi-hacking for me. I tried to get him in game but he left.
@Hint: Never talk to people if you're recording, the cheater may leave before you get a great amount of evidence.
(or when you're spectating someone talk to people on spec only and tell them to use "U" to talk back to you)

**I was told to not ban from here, so please wait for another admin to do it.