The video is taken at about 300 MPH and shows a strafing run on a train. I engaged machine guns prior to aiming on the train so that you can see the gun hits in the grass. Also notice the fire coming from the left wing guns.
Sneaking up from behind on an unsuspecting target. It appears first as a small dot in the center/left of the windscreen. And it appears that I'm seated to the left of center, but that's only because video is captured through the left lens of the headset. Anyway, at about 9 seconds you'll see the guns fire and then. . . .