Seemingly, after the object is no longer present, the feed was activated again. The time span was five minutes.
The camera was attached to the Z1 Truss Segment, facing Destiny Laboratory Module, with the recently attached Leonardo Permanent Multipurpose Module positioned on the right side of the screen. According to station's log from 16 Dec 2012, "Oleg Novitskiy activated the Russian payload TEKh-39 LCS in the Service Module", but there were no tasks for the crew on the american side of the station, which is in the scope of this camera. This is definitely an UFO.