From openSUSE Community Wiki
There are several multimedia formats that cannot be included on the openSUSE CDs/DVD because they are proprietary, patented, restricted formats. Some of these include MP3, MPEG-4, playing of encrypted DVDs, etc. In many cases you can use free formats instead.
Different copyright and patent laws apply differently depending on what country you are in; if you are unsure about a particular restriction or patent, you might consider applying for legal advice. This site does not offer legal advice. For more information about why some formats/codecs are restricted and why they don't ship out-of-the-box on openSUSE, read Restricted formats