See PapaJohn's website on his Troubleshooting guide.
WMM cannot save directly to DVD... you must save as a DV-AVI file and then
use your third party software to create the DVD.

Signature
Cari
(MS-MVP Printing & Imaging)
> When saving complete movie on DVD or hardisk (doesn't matter) it stops
> forever on 20% of saving without any notes. Any clue? Please, help.