It was actually called Back Track (Rewind is the replay of NFL games during the season).
I never cared for it to be a teaching device, but if they used it properly for both good plays and bad and worked out the kinks I think it could of been great. I think the turorials are the way to go when it comes to training. Having a re-do in game isnt ideal.
In reality, the main goal of the presentation team in the future dealing with replays.
1. Better angles and show the whole play
2. Add commentary to the replay (That is really what made Back Track look good)
3. Dont put the play call screen over it, unless the user wants to skip it.
Here is an example
https://www.youtube.com/watch?v=e6uTDtzYtOE