Camera disassembly

There is a Chinese device with 2 cameras and it transmits the image via rtsp so that the 2 images are under one another, but I would only like to fit the lower one on the screen so that it appears when someone rings

this can somehow be broken down or adjusted with css so that the top hangs off the screen and only the bottom is visible close up?


here, the square in the 2nd picture should be filled by the picture


Example: it was like this with the old camera