/usr/lib/x86_64-linux-gnu/libxcb-xvmc.so is in libxcb-xvmc0-dev 1.10-3+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libxcb-xvmc.so.0.0.0
/usr/lib/x86_64-linux-gnu/libxcb-xvmc.so.0.0.0