Inspect your DVDs
If you need to modify a DVD for any reason, you need to inspect it on a very deep level. myDVDEdit is a DVD-based spec editor which is designed to allow you to edit previously built DVDs, a tool which allows you to understand and even modify the content of a DVD, at the deepest level. The complexities of DVD structures are too technical to go into detail, but myDVDEdit allows you to delve deep behind encryption and protection to inspect a DVD structure.
However, for copyright reasons, it won't be able to penetrate all protection layers. Because of this, you will only be able to modify and inspect DVDs that you've created yourself, but it will allow you to learn certain details from protected DVDs. It may also be able to remove restrictions on some DVDs. myDVDEdit is more of a learning tool about DVD structure than anything else, but it's useful for those that need to carry out inspections or possibly remove region restrictions.