/usr/lib/mime/packages/gxine is in gxine 0.5.908-3.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | video/mpeg; gxine %s; description="MPEG Video"; test=test -n "$DISPLAY"; priority=7
video/x-msvideo; gxine %s; description="MS Video (AVI)"; test=test -n "$DISPLAY"; priority=4
video/quicktime; gxine %s; description="Apple Quicktime Video"; test=test -n "$DISPLAY"; priority=4
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