Left4Dead2 Visuals Multihack

[redogg]

in this video: https://www.youtube.com/watch?v=Xxl-q_jFCDc
example here 0:57, 2:05 etc... and more..
I'm sure they've used some kind of vote-hack to be able to manipulate other people's votes remotely. If not, how do they always press to choose votes in perfect sync??

there was some expolit to remotely control other players incuding buttons and all, but it was already fixed
edit: what is this XD, in video they use grenade launcher to launch people XD, this video is old, its before TLS update.. lots of things have been fixed including grenade jumps