Can you use the Pan Behind Mask tool(press "Y) to adjust it? Otherwise, I would just duplicate the video layer, remove all the masks, place it below your masked layer, and use the upper layer as a track matte. Then you just need to nudge the top layer into position.
Johnny Cuevas, Editor
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.