Whatever lights your fire as the old saying goes, but normally most hunters don't shoot grouse out of trees or on the ground down here in the states. It did appear that you were aiming at the ground when the dog came through from left to right in the second video where you shot the bird up in the tree, but appearances can be deceiving. You ask what is the big deal and to answer that is that there are norms for hunting various species and normally grouse, partridge, quail, etc, are not shot out of a tree or while on the ground, but the more sporting way of shooting them on the wing. IMHO I believe that is what Oldtimr was alluding to in his post along with a possible safety issue which may or may not have been present in your videos. Welcome to the site!