The error "an error occured failed to connect to stream" is not something related to DVD playing in my opinion. I am seeing similar error on my machine with any media file when the sound output being used is pulseaudio. After I see error totem just hangs on all subsequent media plying attempts. For now I am using ALSA as output plugin. You can set it from System -> Preferences -> Sound.
See if that solved your problem.
@nullack,
The error "an error occured failed to connect to stream" is not something related to DVD playing in my opinion. I am seeing similar error on my machine with any media file when the sound output being used is pulseaudio. After I see error totem just hangs on all subsequent media plying attempts. For now I am using ALSA as output plugin. You can set it from System -> Preferences -> Sound.
See if that solved your problem.