Publications with embedded media content often require that these files are compressed, streamed or otherwise optimized for delivery and access. When possible, acquire and retain copies of the original, high resolution, media files for the purpose of long-term preservation. Formats for preservation should be open, non-proprietary or widely adopted. Higher quality uncompressed versions of media files are preferred for inclusion in an archival package, but note there may be cases where original media was modified for privacy concerns or narrative reasons and not published in full. Services that preserve publications typically want the version of record; the best quality version of the published file should be sent to the publication archive.

Where there is a choice of which file format to use, consider these guidelines:
11. Use non-proprietary, broadly supported and adopted open file formats
65. Remove private data from export packages