That's completely legal though, ref has got it completely and utterly wrong.
http://www.thefa.com/football-rules...laws/football-11-11/law-14---the-penalty-kick
He stopped like 2 yards from the ball and took another couple of steps before shooting. You can't stop as you shoot, like you can't swing at the ball then cause the ref to dive then shoot. But stopping in the run up itself is 100% allowed. Ref couldn't have gotten it more wrong if he tried and then the VAR follow up got it wrong also. The problem here is when they don't have a clue what the rules are. Ref in the studio also managed to confirm the wrong decision as being correct... which is why I have to laugh insanely at people who say that refs being asked for an opinion are always right, they quite obviously aren't.
VAR should have seen that he didn't stop next to the ball but a couple steps away from it and allowed the goal and taken back the incorrect yellow card. It could have been ordered to be retaken as it looks to be a Spurs player who encroached into the box first.