It does not matter what kind of DVD I try to play on either my DVD-ROM or my DVD-R/RW I get the same error message from VLC media player.
I have tried all disc device options. This is the error message:
Playback failure: DVDRead could not open the disc "/dev/dvd". Your input can't be opened: VLC is unable to open the MRL 'dvd:///dev/dvd'. Check the log for details.