/usr/lib/pd/extra/mediasettings/LICENSE.txt is in pd-mediasettings 0.1.1-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/pd/extra/mediasettings/../../../../share/common-licenses/GPL-3
/usr/lib/pd/extra/mediasettings/../../../../share/common-licenses/GPL-3