OK, i've seen tons of hackers and scripters and cheaters, w.e during my cs 1.6 career, and on this demo i can point out 2 suspicious things:
a) the 1st no scope headshot you got in Long, that was either a lucky shot or you were using an aim key, at least from what i saw. ( Silent aim is a possibility)
b) when you run all the way long with the c4 on your hands not checking any custom spot that a ct could be possibly be camping at, but i couldn't really ban someone based on that as i can't see the radar on the demo ._.
Besides those 2 moments, his gameplay is pretty standard i can't really judge him, based on this demo...
Btw there's indeed a thing called spawn jump, that makes your noscope bullets go straight:
How to "Spawn Jump" - by awoken