/usr/share/gtk-doc/html/ is in libclutter-gst-3.0-doc 3.0.18-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/clutter-gst-3.0/
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstAspectratio.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstCamera.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstCameraDevice.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstCameraManager.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstContent.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstCrop.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstPlayback.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ClutterGstPlayer.html
/usr/share/gtk-doc/html/clutter-gst-3.0/annotation-glossary.html
/usr/share/gtk-doc/html/clutter-gst-3.0/api-index-1-4.html
/usr/share/gtk-doc/html/clutter-gst-3.0/api-index-1-6.html
/usr/share/gtk-doc/html/clutter-gst-3.0/api-index-3-0.html
/usr/share/gtk-doc/html/clutter-gst-3.0/api-index-all.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ch01.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ch02.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ch03.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ch04.html
/usr/share/gtk-doc/html/clutter-gst-3.0/ch05.html
/usr/share/gtk-doc/html/clutter-gst-3.0/clutter-gst-3.0.devhelp2
/usr/share/gtk-doc/html/clutter-gst-3.0/clutter-gst-Types.html
/usr/share/gtk-doc/html/clutter-gst-3.0/clutter-gst-Utilities.html
/usr/share/gtk-doc/html/clutter-gst-3.0/clutter-gst-Versioning-Macros.html
/usr/share/gtk-doc/html/clutter-gst-3.0/clutter-gst-Video-Sink.html
/usr/share/gtk-doc/html/clutter-gst-3.0/home.png
/usr/share/gtk-doc/html/clutter-gst-3.0/index.html
/usr/share/gtk-doc/html/clutter-gst-3.0/index.sgml
/usr/share/gtk-doc/html/clutter-gst-3.0/left-insensitive.png
/usr/share/gtk-doc/html/clutter-gst-3.0/left.png
/usr/share/gtk-doc/html/clutter-gst-3.0/license.html
/usr/share/gtk-doc/html/clutter-gst-3.0/right-insensitive.png
/usr/share/gtk-doc/html/clutter-gst-3.0/right.png
/usr/share/gtk-doc/html/clutter-gst-3.0/style.css
/usr/share/gtk-doc/html/clutter-gst-3.0/up-insensitive.png
/usr/share/gtk-doc/html/clutter-gst-3.0/up.png