Hi Christina,
You’re right about being easy with 3D Layer Warp. It can be done using ProAnimator or Invigorator, but it’s a different process. Are you animating the amount of curl in the image? If so, I’d recommend using layercycling. I wrote a tutorial on the subject for Zaxwerks Invigorator. The concept is the same in ProAminator.
I would make a line representing the starting shape of your layer – use outline stroke to create a filled solid representing the edge of your frame. Use the depth slider to create the face of the frame. Map the movie to this edge. (You may need to use layermapping to easily positing the movie on the edge). To animate the shape of the frame, you’ll need to create a starting shape, an ending shape, and create the “tween” shapes, then assign each to layers in Illustrator. Once that’s one, you can use ProAnimator and the layercycling technique to make it animate (like stop-motion animation).
Here’s the basic tutorial:
https://library.creativecow.net/articles/okerstrom_jon/layercycle.php
If you get stuck, let us know.
Jon