This bug has been around since 12.04. :-(
Workaround
In this order... install phonon-backend-vlc
then remove phonon-backend-gstreamer
restart Minitube
This bug has been around since 12.04. :-(
Workaround
In this order... install
phonon-backend-vlc
then remove backend- gstreamer
phonon-
restart Minitube