/usr/share/doc/gstreamer0.10-x/README.Debian is in gstreamer0.10-x 0.10.36-1.1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gstreamer0.10-x/../libgstreamer-plugins-base0.10-0/README.Debian