Yep, his proximity to the keeper is definitely close enough to be affecting him. That's offside for me. God, even when the ref is talking to the AR the conduct of those teams is beyond disgraceful.
The attacker in close range moves towards the ball as the keeper is preparing to dive - that satisfied the criteria of an obvious action affecting an opponent.
Also, given where the attacker is standing it's impossible for the keeper to make a full dive otherwise he'd collide with the attacker (and quite possibly get kicked in the head).
Also, WHAT ON EARTH was the AR doing by okaying that goal immediately. The AR needed to discuss this with the referee - he's seriously dropped his referee in it here. He would have seen that there was a PIOP very close to the ball and keeper.
The team officials....god, disgraceful. As for coming on with a gun, that should be enough to ban him for life and seriously consider kicking the team out of the comp.
But from the conduct of the players I gather this is a league that doesn't care about RESPECT.