I have tried to combine two video clips, but it feels impossible. In the first clip there's one character running around the screen. In the second clip the character is just standing (still being animated however) and the first clip's character should be running around him. When I tried to use the basic cloning effect by using a mask to the second clip, the first character simply disappeared from the screen when it reached the mask of the second one. How do I combine them so that the first character won't ruin the scene?!
I'm using Sony Vegas Pro 11.