HELLO  ubadfrog.

We experienced a similar issue a while ago we solved it by enabling  the tracking  device on the billboard.

Also refer to this page  it might also help with trouble shooting the issue

https://aximmetry.com/learn/tutorials/for-studio-operators/setting-up-virtual-sets-with-tracked-cameras/

Just cropping the image like you do with virtual cameras wouldn’t work, since the tracked camera is naturally moving around in the scene, hence making any 2D cropping pointless. What you instead is to define your green area in 3D space, using the Studio module. That way anything outside the green area will be cropped out, even when you move the camera. All this is explained in the documentation, so please refer to that.

In the video you also seem to want to move the tracked camera plane like a Virtual Cam billboard. Normally you wouldn’t do that, since with tracked cameras you want the real an virtual camera to match 1:1. The Billboard plane in this case is just a camera projection, determining where in 3D space the live footage is projected, without changing the actual scale or perspective of the footage. Again, this is also clearly explained in the documentation.