First of all, the commentary is ex-MMA fighter turned instructor/UnderGround regular Dan "The Wolfman" Theodore. It appears he's just doing some voice-over work for a lark, but the solo commentary with no other sound makes for an awkward listen.
Such is life on Youtube. If you want to skip the lead, just fast forward to 1:35 in and watch one of the most absurd knockouts you'll see in this sport. Mounir caught some serious hang time.