Great deadlift. Freaky, even. But you have to know what you're seeing: The kid pulls sumo, so already he has a much-shorted range, and he has long arms, so it is even that much shorter a pull.
Look where the bar is when he's at the completion.
I am not built for deadlifting (short arms and long torso) and I pull conventional. When I am standing, the bar is at my groin level.
I have to pull the barbell twice as far.
No slam on the kid, though. He has an advantage. Not his fault.