Comment 8 for bug 1235484

I can confirm that 0.1.46+13.10.20131007-0ubuntu1 in saucy now is also affected. Furthermore, Video{} no longer works as demonstrated by the attached click package. Install with:
$ sudo click install --user=$USER --force-missing-framework ./com.ubuntu.developer.jdstrand.test-video_0.1_all.click

Start with:
$ cd /opt/click.ubuntu.com/com.ubuntu.developer.jdstrand.test-video/current
$ qmlscene ./test-video.qml
unity::action::ActionManager::ActionManager(QObject*):
 Could not determine application identifier. HUD will not work properly.
 Provide your application identifier in $APP_ID environment variable.

(qmlscene:9989): GLib-GObject-WARNING **: cannot register existing type 'GstFormat'

(qmlscene:9989): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed

(qmlscene:9989): GLib-GObject-WARNING **: cannot retrieve class for invalid (unclassed) type '<invalid>'

(qmlscene:9989): GLib-GObject-WARNING **: cannot register existing type 'GstQuery'

(qmlscene:9989): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed

(qmlscene:9989): GLib-GObject-WARNING **: cannot retrieve class for invalid (unclassed) type '<invalid>'

(qmlscene:9989): GLib-GObject-WARNING **: cannot register existing type 'GstObject'

(qmlscene:9989): GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed

(qmlscene:9989): GLib-GObject-WARNING **: cannot retrieve class for invalid (unclassed) type '<invalid>'

Downgrading to 0.1.46+13.10.20130925.1-0ubuntu2 allows the app to work again.