You’ll find the need to change vendor to Packman necessary to acquire and run multimedia codecs which are not completely free. Unlike some other distros, SUSE/openSUSE takes a very strict stance on any apps and libraries that are not completely free.
Find the number your Packman repo is by displaying your repos as follows
zypper lr
Noting the number of your Packman repo,
zypper dup --from *Packman_repo_number*
Now, whenever a package exists both in OSS and Packman, Packman packages will be given a priority.