/usr/share/doc/libwxgtk-media3.0-0v5/changelog.Debian.gz is in libwxgtk-media3.0-0v5 3.0.2+dfsg-1.3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libwxgtk-media3.0-0v5/../libwxbase3.0-0v5/changelog.Debian.gz