Very nice. It's obvious in this video that he likes the interaction with you. Only suggestion I have is to not toss the toy away from you. Try to reward when he us in position and NOT have the reward take him away from that position. Drop it out of you arm then tug a bit, take it back and keep going. Up your pace a bit. You walk slow, and his frustration builds. Walk a bit faster, make the rewards quicker.
But very very nice focus.
BTW. my puppy tried to eat my phone while I was watching this. Every noise your boy made, had him a bit crazy