OK, watched the demo about four times. The suspicious points were:
11:25 — legit, he hears a death near his spawn and of course goes to investigate 11:09 — legit, he hears a ledgegrabbing sound and then sees the enemy 09:05 — at first looks like he goes for a sure kill knowing that the enemy hides there, but after thinking the action through you realize he’d been waiting for the enemy to come after him, and when this didn’t happen, he assumed the enemy must be hiding there somewhere… (in slow motion, you see him almost turning away to check the other side before realizing he just saw the enemy) then he reloads and goes back, failing to see the other enemy who then kills him 08:40 — legit, he hears bandaging
I didn’t watch the demo further than this (that’s where I connected and saw everything in real time).