There was no Television fixed GL camera but there might be one in the stadium system. If so it would only be seen by the Replay guys in the booth. Most D1 stadiums have their own Replay camera system in place. There are usually 5 cameras at a minimum (2 end zone cameras, 2 goalline cameras and 1 High 50 camera). Those 5 cameras feed into the Replay system. When TV comes to town to do a game the TV feed is connected to the Replay system through the High 50 port. The Replay guys have access to everything TV shows and the remaining stadium system cameras.
So.......Replay may have had a shot (GL) that TV didn't have access to. Not sure but they might have.
Not sure where that is true, it is NOT true in any SEC stadium. Replay gets the cameras that are put in place by the production company, no more, no less. There are no "permanent cameras" that are in the replay aresnal, there are no "permanent cameras" in place at all, with the exception of some web cameras for everyday, not game use. The replays come from the production truck, not from any permanent cameras to which TV does not have access.
When Bobby Gaston was head of officials for the SEC, he requested that each stadium place permanent cameras on each goal line, and that the feeds be made available to TV. He was told that the cost (over $50,000 per stadium) was too high, and that the configuration of some stadiums would make it impossible. Having worked in the electronics industry, and with the SEC, I think $50,000 per stadium is WAY too high an estimate. But even if it were true, for the cost of one or two commercials in the SEC Championship game, the entire conference could have been done.