Dou you want a shadow (darker area) on the player or to follow the player with a lighter area? (that would be my choice).
Anyway, you put a copy of the media on another track on top of (and in sync with) the footage.
Make the top footage darker, then use the cookie cutter to create the ligher area which will be the original footage showing through. Then keyframe the cookie cutter position as needed.
Gary Kleiner
