NASA TV UFOs:
UFO Observing a NASA Satellite Capture

One can rule out the possibility that the object is Space debris, based on the fact that at no point during the duration of this footage the NASA official is concerned about the object.

The self-luminous, unknown object descends slowly on the screen:

http://www.youtube.com/watch?v=ffkd5GHFdwY

The footage comes from an unknown Shuttle mission.