This isn't a video about 400+ hours of experience, it's a video showing off a good graphics card and all that where it allows this mercy player to fluidly switch to her gun and back to caduceus staff and also fly over to people she intends to without it freezing up and stopping you mid-flight or go backwards or anything. I'm sure I'd be able to do all of that cool shit, too, if only I didn't have 10 fps and also if I had a team that liked getting killed all at once in a nice tight group all the time.
Good video, though.