UFC 257 Live Stream Free: How to Watch now UFC 257 McGregor vs Poirier Reddit Online TV Big Fight 23th Jan 2021. You need to know about UFC 257 Live Stream Online Free on Reddit youtube crackstreams, buffstreams, Twitter tonight. The highly anticipated return of Conor McGregor is set to take place on January 23 when the UFC 257 former two-division champion meets an old rival in Dustin Poirier at UFC 257 at Fight Island in Abu Dhabi.