1. If you burn DVD video by Nero Video or Nero Burning ROM, the disc will be finalized automatically and it will be playback on most players.
2. If you create Editable DVD by Nero Video, then you can use menu ‘Finalize Disc’ in Nero Video. It will check your disc type. So DVDs you burn with other software may not be compatible. You can try with it.
3. There are no individal tools for finalize DVD in Nero.