What Is Video Mode When Talking About Cameras?

Video mode refers to a specific shooting mode found on many cameras specifically made for capturing video. In this mode the camera will keep the shutter open permanently to allow the capturing of moving images. When using video mode on a camera with a dedicated phase detection autofocus sensor the mirror which reflects the incoming light onto the Af sensor remains in the lifted position. This limits the camera to using contrast detection autofocus only whilst recording video. Modern digital cameras have begun to use sensor based phase detection autofocus, greatly improving autofocus capabilities when shooting in video mode.