gstreamer playback doesn't work ivi-wayland-extension 2.0.2 or desktop-shell.so. Also gstreamer + bad plugins from meta-renesas is at 1.6.3 which is rather old, and 1.10.4 fail to compile with several weston issues.

$ gst-play-1.0 big_buck_bunny_720p_stereo.ogg 

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Now playing /home/0/big_buck_bunny_720p_stereo.ogg
Prerolling...
(gst-play-1.0:4830): GLib-CRITICAL **: g_thread_join: assertion 'thread' failed
WARNING Could not initialise Wayland output
WARNING debug information: ../../../git/ext/wayland/gstwaylandsink.c(309): gst_wayland_sink_find_display (): /GstWaylandSink:waylandsink0:
Failed to create GstWlDisplay: 'Could not bind to wl_scaler. Either it is not implemented in the compositor, or the implemented version doesn't match'

(gst-play-1.0:4830): GLib-CRITICAL **: g_thread_join: assertion 'thread' failed
*ERROR Disconnected: Connection terminated for file:///home/0/big_buck_bunny_720p_stereo.ogg*
ERROR debug information: ../../../git/ext/pulse/pulsesink.c(413): gst_pulsering_is_dead (): /GstPlayBin:playbin/GstPlaySink:playsink/GstBin:abin/GstPulseSink:pulsesink0
Reached end of play list.