Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:dmolkentin:infrarun/openSUSE_Tumbleweed/home:dmolkentin:infrarun.repo
zypper refresh
zypper install coturn
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:dmolkentin:infrarun/15.6/home:dmolkentin:infrarun.repo
zypper refresh
zypper install coturn
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:dmolkentin:infrarun/15.5/home:dmolkentin:infrarun.repo
zypper refresh
zypper install coturn