I was talking about TV audiences not theones in the ground...no idea what goes on there.
Of course broadcasters are going to show something in detail when the game has been stopped for a period of time - to fill in the gap insteas of just watching the players walk around the pitch with puzzled looks on their faces/arguing with the ref etc
Again the nature of the decision/goal/non goal will decide how long something is gone over I guess...like my example of a 30 yd screamer - doesnt need much going over in that one but whereas tight off/on side calls will need to be checked in more detail.