I can understand you want to put a watermark on your videos. Authoring dvds isn't that hard and more and more people are authoring other peoples dvds. Credits on a menu can be erased without much work. A watermark is always there, which is also the negative side. If I would put a watermark in my videos I would make it small and put it in a corner, or when a new song starts you can put the tracktitle on screen along with a watermark.