May not be actually true but needed to be callable using Google Video.
[org.freedesktop.Telepathy.Client.Handler.Capabilities]
org.freedesktop.Telepathy.Channel.Interface.MediaSignalling/ice-udp=true
org.freedesktop.Telepathy.Channel.Interface.MediaSignalling/gtalk-p2p=true
+org.freedesktop.Telepathy.Channel.Interface.MediaSignalling/video/h264=true
tp_base_client_add_handler_capabilities_varargs (priv->handler,
"org.freedesktop.Telepathy.Channel.Interface.MediaSignalling/ice-udp",
"org.freedesktop.Telepathy.Channel.Interface.MediaSignalling/gtalk-p2p",
+ "org.freedesktop.Telepathy.Channel.Interface.MediaSignalling/video/h264",
NULL);
g_object_unref (dbus);