The ref is much closer and sees everything in 3D and much higher definition. Slow motion is the most misleading view you could ever have and zooming in doesn't actually give you any more information. Also TV never shows you all the other clues as to what takes place, where the players' eyes are looking, what is said, what is heard, whether the movement looks natural or is manufactured. The referee has the best view in the stadium. You should try it sometime. Video gives you a different view, not a better one.