/usr/lib/x86_64-linux-gnu/libpolled_camera.so is in libpolled-camera-dev 1.11.10-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpolled_camera.so.0d
/usr/lib/x86_64-linux-gnu/libpolled_camera.so.0d