i have a question regarding the following situation: I have a background layer and a layer with a thought bubble, which is prepared with greenscreen. Now i want to replace the greenscreen area with an additional clip. However, the thought bubble is not rectangular, hence the edges of the video layer below are visible. The ultra key only deletes a colour completely, but is there a key or a workaround option to only replace the bubble area with my clip?
Or is there an option to crop my clip to fit exactly into the greenscreen bubble via a mask or something?