He blows the whistle after the cameras cut to Haaland celebrating (i.e. the time you would normally blow it to signal a goal) so you can't actually see his signal. But he doesn't move his whistle to his lips when he sees the 'handball.' The key for me is that literally no-one in the ground or the commentary team reacted as if the goal had been disallowed, just that they were going for the standard VAR check after a goal. The graphics team change the score to 2-0 and don't change it back until Spurs are nearly scoring up the other end. The commentary team then spent the four minutes talking as if they hadn't given the handball and were just making sure he didn't handle it, and then here's the exact conversation between the commentator and co-commentator:
"In the absence of conclusive evidence, the VAR official Graham Scott is going to agree with the referee's on field decision... ...Well this is interesting. Unless the referee immediately gave......That's obviously what he must have done Clive. Well a little bit of uncertainty there. Certainly Erling Haaland ran away and celebrated the goal. But maybe the referee actually blew for the foul and wanted it checked."
So a TV company with full access to a four-minute VAR discussion about a decision doesn't know what that initial decision was. At the very least, this indicates the level of shambolic, vague communication that led to that disallowed goal against Liverpool last season. At worst, it indicates them desperately looking for an excuse to disallow a goal and when they can't find one, just changing what the referee's initial decision was. "No, I blew for a free kick." This is why they need to be miked up. If he blew for a free kick, it should be immediately obvious to everyone. It shouldn't be the case that the referee blows a whistle and then everyone has to guess what it meant.