/usr/share/omf/gstreamer-properties/gstreamer-properties-cs.omf is in gnome-media 3.4.0-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/omf/gstreamer-properties/../../omf-langpack/gstreamer-properties/gstreamer-properties-cs.omf