You could could create 4 nulls, parent them to a solid in the four corners, then move that solid to the same position and rotation of the precomp in your video. No tracking is necessary.
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.