Hm, I do not get that error here.
Here it just says: (with exactly the same vlc-codecs package as you)
wolfi@amiga:~/Desktop> vlc
VLC media player 2.2.6 Umbrella (revision 2.2.6-0-g1aae78981c)
[0000564c110b0858] pulse audio output error: PulseAudio server connection failure: Verbindung verweigert
[0000564c10fc60c8] core libvlc: VLC wird mit dem Standard-Interface ausgeführt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
[0000564c110a92e8] core playlist: stopping playback
[00007fd858c01788] dtv access error: 12544000 Hz carrier frequency is too low.
[00007fd858c01788] dtv access: Assuming 12544000000 Hz frequency instead.
[00007fd858c01788] dtv access error: cannot demux data fast enough!
[00007fd858c0c9b8] ts demux error: libdvbpsi error (PSI decoder): TS discontinuity (received 12, expected 2) for PID 18
[00007fd858c0c9b8] ts demux error: libdvbpsi error (PSI decoder): TS discontinuity (received 10, expected 15) for PID 0
[00007fd858c0c9b8] ts demux error: libdvbpsi error (PSI decoder): TS discontinuity (received 14, expected 3) for PID 97
[00007fd858095188] avcodec decoder: Using G3DVL VDPAU Driver Shared Library version 1.0 for hardware decoding.
QObject::~QObject: Timers cannot be stopped from another thread
And VDPAU is clearly used when I install libvdpau_r300, because the video is quite broken. 
Rather a bug in libvdpau_r300 though, this was the case before that’s why I uninstall it, my card doesn’t support hardware decoding anyway.
Xine, unlike vlc, falls back to software rendering though even with libvdpau_r300 installed…
And sorry, I somehow didn’t notice that you are using Leap 42.3. This doesn’t have a separate vlc-vdpau package, the VDPAU plugin is indeed still part of vlc-codecs.
This thread originally was about Tumbleweed though (as mentioned in the title), hence my confusion.