MarsSeed [1] filed a deletion request for kcm_webcam [2]: Broken settings addon for KDE4 desktop. Source not found (404). There's no more KDE4 desktop environ available in Arch/AUR repos. Also its dependency kdelibs fail to build.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/kcm_webcam/
