Bullet has mass and it must affect to a plan when it has been shot. So called "law of momentum conservation".
If a plan start to shoot, then the plan must shake, then the bullet of the next should follow other trajectory.
I can not find any shake in the video and the trajectories of bullets are all the same.
Of course I don't mind that.
I think Oleg said early on in the thread that the shake was simply turned off for the video.