Hi,
Yes sure, I created an image to show what I am trying to do.

The blue background is my main image. Above that I have an other track and some video effects from a media generator (represented by the white lines).
So basically I need a circle where in that circle I can animate something. I could do this with only one track and mask that main image so we can look over it and see the animated image in the circle.
But now I want to add some effects over the main image.
Hope it explains a bit more what I am trying to do.