split screen

Yaaargh! Hey everyone. I need help. I see people with a crisp top and bottom split screen [ top - game capture ] bottom - webcam on them and their backdrop. How to do get a clear resolution and split it properly. My PC and webcam are capable of high resolution but as far as stretching the top...

Had trouble with OBS upon opening - would not connect with video device. Reinstalled and now there is a split scene screen and one of the cameras is being shown in duplicate. Can you advise. thanks!