fadeSomeone who knows what they're talking about review this demo.
You can FF past all his Soldier lives because he's awful at that class.
Just did, I'm sure he's cheating. Either he's got the whole triggerbot flick shot thing going on, or he's using an aimbot that requires you to be pretty close in order for it to lock on, which results in him flicking every single shot and hitting them despite bad positioning, crosshair placement, and awareness.
I think it's important to review legitimate demos to make sure you're not just seeing what you want to see, and you can look for the differences that stand out and indicate fishiness. I watched the opposing sniper(dflame)'s POV for a while for a comparison, and dflame's aim showed serious contrast. His most consistent shots were on still people, people moving in straight lines, and shots where the enemy was in plain view near his crosshair, not requiring a fast flick. There weren't any moments that looked fishy for any reason other than that they were impressive shots.
Scout Who, on the other hand, missed still players, but would flick headshot people with only half a second's warning that the person even existed. His flicks sometimes didn't make any sense, such as shooting the ground beneath the target because his target crouched, which nobody who plays this game for 19,000 hours would be dumb enough to do. People don't go prone in TF2.