“Refocusing on the Medium: The Rise of East Asia Video Art” opens at OCAT Shanghai, featuring 25 iconic works by Nam June Paik, Ellen Pau, Yoko Ono, Park Hyunki (image: Untitled (TV & Stone), 1984), and other pioneers. “As a new technology and experimental artistic medium with distinct characteristics, video art arrived with no cultural traditions,” writes curator Kim Machan. The exhibition, she explains, looks at how artists from Japan, Korea, and China explored this “new global medium.”