Finding appropriate digital preservation file formats for audio/visual materials is not an easy task. While much of the recorded sound preservation realm has agreed upon the viability of the Broadcast Wave file format for sound materials, the video realm is still kind of the Wild West in that there is no broad consensus regarding what kinds of file formats or codecs are appropriate for preservation.
Jimi Jones, Audio-Visual Specialist at the National Digital Information Infrastructure and Preservation Program (NDIIPP) at the Library of Congress offers some great insights in an article. If you have videos that you wish to make available online as well as to preserve for many years, you might want to read the article at http://goo.gl/A5ZUj as well as other articles he references.
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