Complex sentence: There is only one clip in the work that is shot on video (not on film); it is the one of the famous mountain dancer, Jesco White, dancing on the picnic table dressed in a white satin shirt.
Split into simpler sentences: There is only one clip in the video that is shot on video (not on film). It is the one of the famous mountain dancer, Jesco White, dancing on the picnic table dressed in a white satin shirt.