It's funny to read the comments on that video. Most of those people are just Dana White haters/Fedor nuthuggers who seem to know nothing about business. It basically boiled down to 1 thing and 1 thing only - co-promotion with M-1 Global. Just like Dana already knew, M-1 Global isn't **** and is just trying to use the UFC to grow its' stock. UFC is king and doesn't need to co-promote anybody.
Plus, Dana wanted to give Fedor an instant crack at the UFC HW champ to prove that he isn't in the same league anymore. It's certainly been proven in Fedor's last 2 fights.