More insight on the deal from AllKPop back in October:

Singer Psy, who previously swept the headlines by taking a shot of soju in the middle of his Seoul performance, has been offered a CF deal by ‘Hite Jinro‘, the producers of soju brands like ‘Chamiseul‘. On October 4th, Psy had cleared a bottle of soju during his free concert in front of Seoul city hall. Although the incident at the time had been a topic of controversy, Hite Jinro thought of it as the perfect marketing opportunity considering that the scene was viewed by millions of people around the world.

The beer that Psy is pitching specifically is called Dry Finish D. Take a wild guess at the beer style.

…And yes, Hite Beer can be found in the U.S..