I am trying to figure out how it looks for you. It would help if you can post a image of what you have. But I think it might looks like this. This camera is on motion detection with the yellow frame and you have the video. In your case you have the yellow frame, but no video? If you get the yellow frame NCS have a connection with the camera and receives a video stream, but the camera do not deliver an image. To have MD to work it must have a video image to work. Therefore, you have no videos in the Library.
Is it the same for all cameras. You have the yellow frame, but no video?
As I see it now the problem is not MD, but to get the video from the camera. We have had discussion earlier so this have been working before?
You need to give me more info to work with.