Mike, I watched the video & I have to say, I don't get what all the hubbub is about. Now your son might not have made the best shot on that deer, not every shot is perfect, & yes he may have made a better shot if he had stopped the deer. And yes, the deer likely would have stopped if he had called to it, but then again, it was a 10 yard shot, not a 30 yard shot.
I've watched Will Primos do basically the same thing while driving elk except his shot was at 30-35 yards so he did call out to his elk to get him to pause for the shot, but again the shot was at 30+ yards. If that bull had come trotting by at 10 yards would he have still stopped him? I'm thinking no. And I'm betting knowone would have said anything about how unethical it was either. But hey, this is a public forum & folks are gonna share their opinions, so take the good with the bad.
Good luck to you & yours this season.