Nice!! Wondered what your neighbor was going to think when you shot! Love your sound effects.
Looks good. Your pup has a great attitude. Got a couple suggestions for you. I would have ended after your third toss of the wing. You always want to end on a REALLY high note, when everything is going right and not try to get "just one more" retrieve in.
At around 3.15 in the video you correct him for not giving up the wing. You tell him "no" strongly, tap him on the face, tell him no a bunch of times, hold the wing in front of his face, and tell him no some more. The next retrieve he does not come back to you. There is a direct correlation between your correction and his not coming back to you. I'm actually surprised after all that that he went for the wing again. Fair number of pups would not have.
At his age going out and getting the wing, bringing it back to you should be a cause for a PARTY! Don't be so quick to take the wing away from him. Get him back to you but fluff him up and tell him he is the greatest dog in the world! He wants the wing which is why he is retrieving it. If Dad doesn't make it a party and puts to many rules in at this stage of the game, pup is going to not want to come back...or go.
And you are right...he should be on a 20 foot or so rope.