For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:achaios/openSUSE_Tumbleweed/home:achaios.repo
zypper refresh
zypper install v4l2ucp
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:achaios/15.5/home:achaios.repo
zypper refresh
zypper install v4l2ucp
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:achaios/15.4/home:achaios.repo
zypper refresh
zypper install v4l2ucp