I haven't tried this and I've not got the thing in front of me but can't you just keyframe the movie position over time to create this effect in PPro?
And/or apply a transition between your actual clip and a piece of black video. I'm sure there's one that pushes one clip off the side of the screen by another.
But I suppose if there's any clipping of the original you would be in trouble.
BTW, this is really easy to do (even with clipping) if you have a Matrox RTX card, and real-time too