mopidy-youtube: Your GStreamer installation is missing a plug-in

I get this error when mopidy play this video https://youtu.be/uISfZEdqdAM

WARNING  Could not find a audio/x-unknown decoder to handle media.
INFO     You might be able to fix this by running: gst-installer "gstreamer|0.10|mopidy|audio/x-unknown decoder|decoder-audio/x-unknown, codec-id=(string)A_OPUS"
WARNING  There is no codec present that can handle the stream's type.
ERROR    Your GStreamer installation is missing a plug-in.

Ubuntu 14.04 x64 Pafy 0.3.74 Plugins:

user@mail:~# apt-cache search -n gstreamer0.10-plugins
gstreamer0.10-plugins-base - GStreamer plugins from the "base" set
gstreamer0.10-plugins-base-apps - GStreamer helper programs from the "base" set
gstreamer0.10-plugins-base-dbg - GStreamer plugins from the "base" set
gstreamer0.10-plugins-base-doc - GStreamer documentation for plugins from the "base" set
gstreamer0.10-plugins-good - GStreamer plugins from the "good" set
gstreamer0.10-plugins-good-dbg - GStreamer plugins from the "good" set
gstreamer0.10-plugins-good-doc - GStreamer documentation for plugins from the "good" set
gstreamer0.10-plugins-bad-multiverse - GStreamer plugins from the "bad" set (Multiverse Variant)
gstreamer0.10-plugins-bad-multiverse-dbg - GStreamer plugins from the "bad" set (Multiverse Variant)
gstreamer0.10-plugins-bad - GStreamer plugins from the "bad" set
gstreamer0.10-plugins-bad-dbg - GStreamer plugins from the "bad" set (debug symbols)
gstreamer0.10-plugins-bad-doc - GStreamer documentation for plugins from the "bad" set
gstreamer0.10-plugins-cutter - Cutter GStreamer plugin
gstreamer0.10-plugins-ugly - GStreamer plugins from the "ugly" set
gstreamer0.10-plugins-ugly-dbg - GStreamer plugins from the "ugly" set (debug symbols)
gstreamer0.10-plugins-ugly-doc - GStreamer documentation for plugins from the "ugly" set