Default installation of DVD pack openSUSE won't able to play video's of formats *.avi, *.vob, *.flv, *.wmv .... etc.
follow this to install mplayer and play video's in it.
TO install the codecs needed to watch DVDs, handle MP3s, etc. follow this.
1. YaST -> “Software” -> “Software Repositories”
2. Click “Add”
3. Select “Community Repositories”
4. Select “Packman Repository”...