Simple question about VideoLAN repository

Hello!
I followed this thread:Check your multimedia problem in ten steps - openSUSE Forums
and here is my step 2 issue:

linux-ra0y:/home/chazam # rpm -qa --queryformat '%{NAME} -> %{VENDOR}
' | grep -i VideoLAN
libxvidcore4 -> VideoLAN Project (http://www.videolan.org)
libvlccore2 -> VideoLAN Project (http://www.videolan.org)
libmpeg2-0 -> VideoLAN Project (http://www.videolan.org)
vlc-qt -> VideoLAN Project (http://www.videolan.org)
libass1 -> VideoLAN Project (http://www.videolan.org)
libproxy0-gnome -> VideoLAN Project (http://www.videolan.org)
libdvdcss-devel -> VideoLAN Project (http://www.videolan.org)
libx264-66 -> VideoLAN Project (http://www.videolan.org)
libproxy0-networkmanager -> VideoLAN Project (http://www.videolan.org)
vlc-aout-pulse -> VideoLAN Project (http://www.videolan.org)
libmad0 -> VideoLAN Project (http://www.videolan.org)
libvlccore0 -> VideoLAN Project (http://www.videolan.org)
libproxy0-mozjs -> VideoLAN Project (http://www.videolan.org)
libmp3lame0 -> VideoLAN Project (http://www.videolan.org)
libkate1 -> VideoLAN Project (http://www.videolan.org)
libvlc2 -> VideoLAN Project (http://www.videolan.org)
libdvdcss -> VideoLAN Project (http://www.videolan.org)
libdca0 -> VideoLAN Project (http://www.videolan.org)
libproxy0 -> VideoLAN Project (http://www.videolan.org)
vlc-gnome -> VideoLAN Project (http://www.videolan.org)
liba52-0 -> VideoLAN Project (http://www.videolan.org)
vlc-noX -> VideoLAN Project (http://www.videolan.org)
libmp4v2-0 -> VideoLAN Project (http://www.videolan.org)
vlc -> VideoLAN Project (http://www.videolan.org)

The thread said that i should only have the libdvdcss installed from this repository.
-Why?
-Should i remove all the others?

thanks.

You installed vlc and all its dependencies from videolan repository. If vlc works well then all right.
The guide aims to verify if, in case of problems, they are due to repositories conflicts. Packman repo and videolan repo have same packages (at least their name), but it’s better not to mix them.
For multimedia i use only packman. I enabled videolan to install dvdcss, then i disabled it.

Multi-media and Restricted Format Installation Guide - openSUSE Forums

Disable VLC repo and do update all unconditionally in Packman