The language sounds Russian to me. But some neighboring countries from the former Soviet Union sound the same, so could be Ukraine or the such.
The video shows a loudmouth being generally annoying in what looks like a grocery store. He keeps nagging like anybody cares about his opinions, and gets tolerated until he physically touches the arm of the guy in the baseball hat, who quickly responds with an elbow knockout.
I think the elbow sandwich fed him some of his teeth. The double tap from the floor left him out cold. Savage…
Props to Best Gore member @natural-selection-2 for the video: