This clip is of a 2003 piece called “Rhapsody In Seoul” that the late Paik Nam June did. It’s displayed at the Seoul Museum. Paik Nam June, who passed away this past February, was one of the world’s pioneers of video art. He was part of a collective in the early 1960s that also had his friend Yoko Ono as a member. He performed with John Cage amongst others.
Here’s a link to an article, which lists several of the places where his works can be seen in Korea:
http://times.hankooki.com/lpage/culture/200602/kt2006020520262711700.htm