Green screen+cutout+dual camera, the principle is simple, and the operation needs certain technology. First, replace the live background with a green screen cutout. I have a tutorial on this, then I get a dual camera and tutorial, and then I shoot the anchor's camera. Also use the green screen matting to make the anchor background transparent and move down on the anchor screen.
Use professional screen recording, such as OBS or vMix &;; The recording software can "overlay" the live images (similar to the layer function), and with the live green screen layout and live real-time matting function, the "software-processed images" can be synchronized to the live platform, and you can see the live broadcast effect of Pauliwei introduced above.