How can encode video with images like these [overlay a video over a fixed image] with ffmpeg?
Asked and answered : How can encode video with images like these (overlay a video over a fixed image) with ffmpeg?

But you want to add coordinates to the movie file to scale to a specific area.

For the perspective/scale:
https://ffmpeg.org/ffmpeg-filters.html#toc-perspective

For the overlay:
https://ffmpeg.org/ffmpeg-filters.html#toc-overlay-1