Very good editing. I liked the sound sync in to motion... but i have to agree, a bit too much QS.
The quickscoping enthusiasts die for clips like this. They get wet dreams imagining themselves doing it. If there is anything she captured in this vid it's that fantasy.
Not to sound like a fanboy of the Q-scoping mechanic... but I enjoy good sniper gameplay and if it's going to be a montage, I find quickscoping to have a lot of style. Much more style than clips from most other gun classes.
That montage editing also has a sub culture where they get creative with design between clips to make an entertaining "movie" type of montage. She took that sub culture to another level. I don't think it would've worked as well if it wasn't based off of quickscoping.