Best practise for gstreamer plugins?

[l-snapcraft at znn.info]

What is the best practise when working with gstreamer plugins?

When packaging feedreader, an app with some video and music
capabilities, i hit the problem that it calls gst-plugin-scanner which
is not included in the package. So the application does not run.

     (feedreader:26336): GStreamer-WARNING **: External plugin loader
failed. This most likely means that the plugin loader helper binary was
not found or could not be run. You might need to set the
GST_PLUGIN_SCANNER environment variable if your setup is unusual. This
should normally not be required though.

What is the "snap way" of solving this? When i include gstreamer in the
snap it will cross the 100MB mark.

Thanks