They listed athletic revenues of $72M with a breakdown by source. 6% of it came from broadcast revenue.
6% of $72M is ... $4.32M
Now there's some rounding there, so it could be as high as 6.5% of $72.5M, which would be $4.71M
Or as low as 5.5% of $71.5M, which would $3.93M
So yeah, $4.5M seems like a reasonable estimate of what they got from ESPN...based on what BYU told us. I'm sorry you don't think BYU is a trustworthy source