Motion tracker + Corner Pin to make a 3D screen in a moving video

Hello Shortcutters

Is there any easy way (instead of making it image by image) to track a rectangle green screen inside a video in order to replace it by another video? the camera is off course moving, so this rectangle sometimes needs perspective.
So i was thinking doing a combination of Motion tracker + Corner Pin.
I guess we can track the 4 corners of the green screen with 4 trackers in Motion Tracker. But then , how to apply them to the 4 angles of Corner pin ?
Thanks for your help !!
Peace & Love

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