When you are editing videos in Nero Video, Nero Video automatically saves your project in the background.
If Nero Video stops working before you saving your project, you could still find the automatically saved project in this way:
1. Open current user's Documents folder: C:\Users\[current user]\Documents\NeroVideo\AutoSave. There is a file called AutoSave.tmp.
2. Copy AutoSave.tmp to the folder where your projects usually located, rename it to AutoSave.nvc.
3. Run Nero Video and open AutoSave.nvc. You will see your project.