Where would/is Greenburgs' mind these days?

Curiosity has hit me. Greenberg wrote about art for arts sake aka the paint is the painting. How would/do Greenbergians view video art. Would it be the quality of the video, or if it was contaminated with subject matter? The actual quality of the film it was recorded on? The film itself? The Camera?

I am taking art 199 Video Art intro. Is the video art the video or the act that is happening. It has many of the same intricacies as photography does and more. . .sound.