Revert "video-texture: speed up switching to another uri"
Revert "video-texture: speed up switching to another uri"

This reverts commit b8f3f9d726ed6ca3f098d543542d8d33db612eb1.

Nothing to bad, just breaks playback with recent GStreamer...

ystreet/clutter-gst,lubosz/clutter-gst,ystreet/clutter-gst,lubosz/clutter-gst,GNOME/clutter-gst,lubosz/clutter-gst,GNOME/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst,skinkie/clutter-gst,skinkie/clutter-gst,GNOME/clutter-gst,skinkie/clutter-gst,ystreet/clutter-gst