I am using Screen Cast to broadcast my mobile screen on my PC. But my mobile screen turns off after the screen times out. Is there any way to prevent this while streaming?

I want to use WebCam Monitor to record the video from my old USB camera, but it does not have a microphone. I have a separate microphone. Can you tell me how to use it to capture the audio while recording the video from the camera?

I have added two cameras in WebCam Monitor, but I can see only one camera at a time on the interface. Is there any way to see both Camera previews at the same time?