How Instant Replay Is Changing the Football Landscape • Hudl Blog
Instant replay - Wikipedia
History of Instant Replay
NFL playoff officiating decisions - What happened on controversial calls -- right and wrong -- and what came next - ESPN
NFL Sky Judge: How the New Process Works + Impact on Games
Replay Assistance Rule NFL Football Operations
NFL helmet rule: No changes coming or instant replay for penalties
You elected them to write new laws. They're letting corporations do it instead. – Center for Public Integrity