There's only near 1'04 that you can see something which can be either lag or speedhack : high strafe speed. But for all the forward movement, it's just sprint and it's why he dies : sprint forward almost all combat long.
Must try it this evening against one of you as my ping should be almost like theirs.

[Linked Image from w3.the-kgb.com][Linked Image from w3.the-kgb.com]