It looks like this: make config_append GCS_EXTRA_CONF+=gstreamer
Is not the best method to enable compilation for the video widget. In the config file, the "override" keyword is added in front of the line. It looks like this is causing some parts of osg to become disabled due to the override.
PFD modelview is impacted by this. And a make package complains about missing osg dll files.
ifeq ($(GCS_WITH_GSTREAMER), 1)
GCS_EXTRA_CONF += gstreamer
to the Makefile and used this line to enable video: make config_append GCS_WITH_GSTREAMER=1