My video capture device is set to my camera (through Black Magic Design). The screen displays black on OBS. When I unlock and click on video capture device, I can see red lines shooting in three different directions. I've had this problem before because my device is trying to show all three displays (laptop, tv screen, and extra monitor). I cannot seem to move the image from the camera back into the viewer. When I try to bring the image back into the viewing space, the lines go away and video capture device deselects. Please advise.