/usr/ is in libopencv-video-dev 3.2.0+dfsg-4build2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/opencv2/
/usr/include/opencv2/video/
/usr/include/opencv2/video/background_segm.hpp
/usr/include/opencv2/video/tracking.hpp
/usr/include/opencv2/video/tracking_c.h
/usr/include/opencv2/video/video.hpp
/usr/include/opencv2/video.hpp
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libopencv_video.a
/usr/share/
/usr/share/doc/
/usr/share/doc/libopencv-video-dev/
/usr/share/doc/libopencv-video-dev/README.Debian
/usr/share/doc/libopencv-video-dev/copyright
/usr/lib/x86_64-linux-gnu/libopencv_video.so
/usr/share/doc/libopencv-video-dev/changelog.Debian.gz