/usr/lib/x86_64-linux-gnu/vdpau/ is in mesa-vdpau-drivers 18.0.0~rc5-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_nouveau.so
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_nouveau.so.1
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_nouveau.so.1.0
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_nouveau.so.1.0.0
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r300.so
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r300.so.1
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r300.so.1.0
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r300.so.1.0.0
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r600.so
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r600.so.1
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r600.so.1.0
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r600.so.1.0.0
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_radeonsi.so
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_radeonsi.so.1
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_radeonsi.so.1.0
/usr/lib/x86_64-linux-gnu/vdpau/libvdpau_radeonsi.so.1.0.0