The NFL has an instant replay camera problem
Upon further review: Alabama experimenting with instant replay in high school football
Hurley: NFL Trying To Fix Instant Replay Problem By Not Addressing That Problem At All - CBS Boston
History of Instant Replay
History of Instant Replay
Upon further review – Instant replay works
SMG: Why do we have instant replay?
Dec. 7, 1963: Video Instant Replay Comes to TV
Instant replay: How the NFL left soccer in the dark
NFL replay reviews, challenges drop with new rules and tech - ESPN
History of Instant Replay
Saints-Rams referee controversy: NFL will consider rule changes to make pass interference calls subject to instant replay review - Niners Nation
MLB finally ready to reap benefits of new replay digs