Could you explain the import of that in simple layman's language?
Sure... a fader bar looks sort of like a very small throddle control on a boat. A small lever that can be pushed forward to a stop or pulled back to a stop. The "fader bar" is used to smoothly transition between two video sources. In this case when the fader bar was pulled back we have a picture of V.P. Cheney only. When we push the bar forward we keep the picture of the V.P. but then fade in the black "X". The video I saw the "X" did not appear suddenly as in a "take" it was "faded" in and then back out.