That video was done by a group called The Ant Farm, it was 1971 so those sets were just common old TV's at the time.
http://en.wikipedia.org/wiki/Ant_Farm_%28group%29
What irritates me about Nam June Paik is his followers still want to copy him.
His work also includes some very desirable sets too, several Philco 48-1001's Hallicrafters, several Farnsworth 651P's etc...
