If you're on a widebody with Live TV, you may be watching SPORT 24 which carries NFL games. I just checked their schedule for 8 September, and it shows they will be carrying NFL that day but the matchup is TBC vs TBC.
On a quick side note, I watched Super Bowl LI on SPORT 24 when flying AKL-LAX. But all of the Live TV froze on the plane in the 4th quarter. We didn't know the outcome until we landed, and missed one of the most incredible comebacks ever!