/usr/share/doc/python3-pysdl2/html is in pysdl2-doc 0.9.3+dfsg2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python3-pysdl2/../pysdl2-doc/html
/usr/share/doc/python3-pysdl2/../pysdl2-doc/html