Also "bout time pub n grub" should have it on although they claim to be a "Ute spot" it's also at the gateway.

Other option is Iggy's sports bar a couple blocks south of the gateway, I'm assuming they'd have it. I think their food is pretty good as well.

Beyond that, Maxwell's is right in the heart of downtown. Never been there but looks like a cool spot from the outside. It's a sports bar. There's actually several bars downtown that will have games on but the ones I mentioned will most likely be the most "BYU friendly of them all" plus the others are more traditional bars if that's not you're thing.