"Now, why single out different kinds of formats or different kinds of media and separate them out from the text-based materials that we’ve typically talked about? And there are a variety of answers. These diverse media present diverse challenges, and they also come in many different variations. I mean, just on the example of audiovisual works, they could range from a simple home movie to a feature release film, or on the example of sound recordings they could be something as simple as an interview, as straightforward as an interview, or it could be ethnological field studies, or it could be, well, Girl Talk and mashups and a variety of other kinds of works."