The morning after a game, you can find coaches with the lights off in their office (or man cave) thoroughly reviewing game film that their video staff / graduate assistants spent hours inputting the night before.
Every staff handles film review differently, but the staff at Oregon is a big believer in grading the film, meeting as a staff, and then sharing the highlighted feedback with players. After practice today, Mark Helfrich explained how long that takes depends on the coach. For example, offensive line coach Steve Greatwood will probably spend a few hours grading his five offensive lineman, while running backs coach Gary Campbell will have just a running back (or two) to watch on most plays.
Helfrich noted that after all the coaches grade their positions individually, they'll come together as a staff to share notes and make sure everyone is on the same page.
"It ends up being one very thorough viewing individually, and then one we just hit the highlights as a staff."
Asked if he handles any grading of positions personally, Helfrich added that the position coaches handle all of that, and they divvy up special teams grading among the coaches responsible for different units.
As far as how long the staff deliberates on film together, Helfrich seemed to pull a random number out of thin air, noting they usually spend "about 3 hours and 7 minutes" together.
Whether that's accurate or not is irrelevant, Oregon is one of the best coached teams from top to bottom, and their ability to coach from the film is a big part of that.