If you were able to look at the rabbit in the video (the head) the skull is crushed, generally the neck is snapped as well. I don't know medically why this bleeds a rabbit out so quick , but it does. I have hit them and they don't bleed out, this generally irratates me a bit. This happens on maybe 1 out of 50. I am very paticular on where I hit the rabbit, too far back you bruse the shoulders, too far forward you don't kill it. The pellet gun it sure fired way to kill, but I would cut the throat as soon as you shoot, the heart will still beating, and should push most of the blood out. So yes, the strike will cause more bleeding than just a shot to the head...I have tried every method out there...except the spring gun...whatever that thing is called.
Bowbuild