A) It is a DVD burner and not a reader, and
B) It is working.
May I suggest that you put a writeable DVD in the drive and see if it is recognized? If you let us know what version of the OS you have and what software Dell provided, we may be able to identify the app that you should be using to write to the drive and see if it can write at all.
After we establish that the drive is a burner, and that it works, we can address the specifics of burning a DVD from that particular camera. Did the camera, perhaps, come with a CD with authoring software on it?