From the YouTube description:
He faces Dan Miller (13-5-0) in the Octagon at UFC Rio. But there is another side to Brazilian Rousimar Palhares (21-3-0) than his tough exterior. Even though this is his eighth fight with the UFC, for the first time, our crew peels back the layers to find out that it wasn't an easy journey to the Octagon. Catch UFC Rio: Silva vs Okami live on Pay Per View, August 27 at 9PM ET, 6PM PT.
Palhares was last seen inside the Octagon on March 3, submitting Dan Branch with a kneebar at UFC Live: Sanchez vs. Kampmann. Palhares is one of the most feared leg lock specialists in the UFC with 5 career submissions via ankle lock or heel hook.