I tried burning a DVD with a video playing in the background on hte menu using NeroVision 3.
When I burnt it, the video in the background only played for 10 seconds and then repeated itself.
Why is this and how do I stop it?
Are you playing video in background with one DVD player and copy with another one?. If that is the case you want to make sure you have Multi-tasking processor to do that but if you are reviewing video while you are copying by watching through Nero review window then you should not have any problem unless you don't have enough memory in your system.
This is an easy fix. The play time is under "automatization" while you are editing the menu settings. The default setting is 10 sec. You can set it for whatever time you want.