The Digital Preservation Coalition has released Preserving Moving Pictures and Sound by Richard Wright.
Here's an excerpt:
The status and technology needs of moving picture and sound materials will be examined. The scope of the report includes analogue material on physical carriers such as film, audiotape and videotape (and so stored on shelves); digital material on physical carriers such as CD, DVD, digital videotape and digital audio tape (also stored on shelves); and finally, digital content in files and so held on some form of mass storage. While the focus is on professional collections in institutions, companies or other organizations, the information will be relevant to personal holdings.