With finalize is only meant that one abschliest the DVD. Just like when you burn a CD Multisesssion (repeatedly burned to a CD -. For example, I burn today a few MP-3's on the CD tomorrow a video, etc.). As long as the CD / DVD has not been completed / finalized as long as you can, if enough space available on the media, or the additional data / video. Whatever it burn / record. As long as, the CD / DVD but only in the PC / DVD recorder are represented in which it was fired. After Abschliesen / finalization can be recorded on the CD / DVD nothing more, but it can then be played in any DVD player. That should but actually are in the manual (which is why a bad Rezesion from 1 * to give just because you can not read the instructions but almost embarrassing - I have in any case a good laugh)