/usr/lib/x86_64-linux-gnu/libaviplay-0.7.so is in libavifile-0.7-dev 1:0.7.48~20090503.ds-19+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libaviplay.so
/usr/lib/x86_64-linux-gnu/libaviplay.so