The video behind all of this -- and inside the trailer -- is called "A Fire in My Belly." It was made by the late artist David Wojnarowicz. It was part of the Smithsonian exhibit "Hide/Seek," the first major exhibit to explore gay themes in art history.
The video includes images of ants crawling on a crucifix, and that earned the ire of a Catholic organization and Congressional Republicans who called for it's removal, which the gallery then did.
The protesters say they will keep the Museum of Censored Art open through Feb. 13, when the Portrait Gallery exhibit closes. New York's Museum of Modern Art has acquired the video and is showing it as well.