Lets say there was a theoretical short yardage play. Because all 22 players were crowding around the ball there was no single clear view on video showing both the ball breaking the plane and the RB's knee not down. However they did capture the play looking down the goal line from both sides. On one view you see the ball just barely over the goal line; but you can't see his knee. On the other you can see when his knee goes down; but not the location of the ball. In both videos you can see something that lets you time reference each event to each other. Maybe the MLB just makes contact with the RB at the moment the ball breaks the plane and you can see that the RB's knee wasn't down at that moment; but only if you look at the other view. I'm not so sure how good I did explaining my question. In a nutshell, can the ref use two views together to make the call or does he have to pick just the best one and make a decision based on what it shows him alone?