I can give the code to beat BYU.
BYU doesn't have much talent on offense aside from the quarterback who's really a running back because he can't pass very good. If your coaches go back and look at how Utah State and Utah have been able to shut down the BYU offense for years, Nebraska will win for guaranteed. The way Utah and Utah State has been able to beat BYU year in and out drives all the Cougar fans crazy because they hate so bad to lose to the two state schools in Utah they look down on and despise so hard. BYU fans run around saying they're school is the Harvard of the West for academics and the Notre Dame of the West for sports.
OK the code, if you lock down BYU receivers, it puts Taysom Hill in a position that he has to run in order for the Kewger offense to gain any yards. The offense is mostly 1 dimensional with the lack of talent. It's also not very hard to shut down BYU passing game because Hill is almost always off target, sometimes badly. So after shutting down BYU passing, put a spy on Hill who can run faster than him. Hill will start running a lot if the passing game is going bad, so you just need to get him that that's his only option and he'll play right into your defense's hands if the spy is quick enough to run him down.
Your coaches should also be aware of possible cheap shots like the horrible helmet to helmet hit BYU did on Washington posted above.
Good luck in the game. A lot of people in Utah will be cheering for Big Red.