It is live, but the weigh ins for the crowd and live video is ceremonial only now. They actually weighed in hours ago this morning. Pettis missed weight hours ago, we were talking about it in the UFC 206 thread.
They used to do the official weigh ins live in front of the crowd, but changed it a couple of months ago, now they let the fighters weigh in whenever they feel like it between 6am and 9am or some shit, better for fighter safety apparently.
Just mobbed on 2 bowls of pot roast and 64 oz of good craft beers... had 32 oz crowler of pallet wrecker by green flash thats 10% abv and 145 ibu lol hoppy as a muthafucka you dig... also drank 2 comatose imperial ipa's from good life. Beer 4 life