I can not watch the video from work but I believe the point being made is that if it is one of the amounts on the TV screen that has disappeared, well those are not part of the set but are superimposed after the programme for the enjoyment of the TV viewer. At that stage the whole game is known: which number was first, which next, which last. So incompetence in the editing room can easily make things appear to happen before they ought to be able to.
Of course this explanation fails if the video shows the board at the back of the 'stage' missing the amount, rather than the "overlay" seen on the TV screen.