I'm not the best, or even any good, at lip reading. So, I'm just speculating here.
IF the ball would have hit the ground, the receiving team has the right/opportunity to catch the ball. Or, at the least, call a fair catch. There's a clause in the rules about interference in these situations.
The problem isn't Dabo's understanding of the rules.
The problem is the rule he was pointing to didn't apply in that case.
That's my interpretation ...