Possible but the more in the know, the greater the change of someone blowing security.
Scarey thing is...he's not doing anything but following regular sniper doctrine as far as I understand it. Are we really *that* dependent on the other side being morons to catch them?
Now that we know he's out there and within a short distance of the victim, I suspect rather than the victims comrads buttoning up, they'll start advancing or do something to draw a second shot and better locate him. He will take a second shot because he did so in one of the frames and appeared to miss. I also notice that he left quite a few WIA's. Either he isn't a very good shot or, he's firing from an unstable platform such as a car trunk.
I haven't seen the video, but from what I understand the Dragunov, and presumably this Tabuk, isn't much of a sniper rifle. I believe they are only good for something like 1 MOA, so I doubt he could get away with anything further out.