One of the key differences between video art and theatrical cinema is that video art does not necessarily rely on many of the conventions that define theatrical cinema. Video art may not employ the use of actors, may contain no dialogue, may have no discernible narrative or plot, or adhere to any of the other conventions that generally define motion pictures as entertainment. This distinction is important, because it delineates video art not only from cinema but also from the subcategories where those definitions may become muddy (as in the case of avant garde cinema or short films). Perhaps the simplest, most straightforward defining distinction in this respect would then be to say that (perhaps) cinema's ultimate goal is to entertain, whereas video art's intentions are more varied, be they to simply explore the boundaries of the medium itself, or to rigorously attack the viewer's expectations of video as shaped by conventional cinema. Wikipedia.