It's often pointed out that the ball is only live for about 18 minutes of every game. But what makes football so fascinating is that for every play there are 22 different jobs being executed at the same time. And the jobs change every play.
For something like baseball, you can basically see everything happening in frame the whole time. But for football, the game is so information dense that you can spend hours unpacking the game afterwards to see what was going on. That's why replays and highlights are so much more satisfying. And that's what makes it fun to analyze and or watch videos during the week - you can find all sort of unique or interesting aspects just watching the same play again and analyzing a different personnel group.
It also explains why cameras are everywhere (besides them being just flat out cheaper for high school games, etc). Film study is a crucial part of the game for players - more than in any other sport.