I love passthrough but often - especially with AI passthrough - results are pretty terrible.
Usually due to a mismatch between your own world and the performers - often you get a brutal clash of depth/perspective difference that ruins immersion.
Especially bad in videos where the performer is not close to the camera, or they aren't perfectly centred.
I'm proposing a "window" mode where the video is only visible where you want it to be, so parts of your real world environment are visible.
Options to change the window size/shape, position and edge blur amount would be ideal.
For example:

