on ESPN this year and last year in the Saturday 9:30/10pm ET timeslot. But again, it's just one game and LSU usually attracts great ratings for its timeslot and channel, so you need to run similar analysis for other BYU games.
But, FWIW, it did better than most PAC matchups but much worse than most SEC matchups last year:
LSU-BYU = 1.763M viewers
Auburn-Clemson = 4.72M
Arkansas-A&M = 3.872M
Mississippi-LSU = 2.669M
Texas-California = 2.447M
USC-UCLA = 2.301M
Washington-Cal = 2.007M
Washington St.-Stanford = 1.754M
Arizona-ASU = 1.672M (Black Friday - 10pm ET)
Virginia-Oregon = 1.579M
UCLA-Washingon St. = 1.311M
Arizona-UCLA = 1.027M
Washington St.-Cal = 1.005M