system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Where is the live sporting event footage stored after they are aired? Do networks have all the footage, even the angles that weren't shown in a huge archive somewhere?
gpt
Depends on the networks.  Sort answer is, yes.  Some of it might be discarded later, but that is a matter of decision for the network or for the league.  Basically, for all the footage the network didn't air, is it worth it for them to save it somewhere, or is it not worth the cost of saving the storage space.  Storage is so cheap now, that usually it gets kept.  

One thing the NFL markets now is a thing called "all-22" film.  Its pretty cool if you LOVE football.  

When the NFL films a game, there is a camera up high that has a view of the entire field (and thus every player on the field, "All 22" of them.)

It doesn't make for good game coverage, so that's why you don't see the angle on TV, but for the coaches to review footage and figure out what happened, they need to see everyone.  Who went were and what as the play developed.  

Since so many fans are getting really into watching and understanding the finer points of football, breaking it down in their own blogs and reviews, NFL now allows fans to subscribe to the coaches film view too.