What you click depends on what you have done previously:-
If you have just reloaded the project to burn another DVD and: -
1. made no changes to it then click Yes
2. made changes then click No - you will also be asked if you want to re-encode click Encode All
VOBs are the video files which are burned to DVD.
John
Thank you John, When I actually went back on to burn, that box did not say 'yes or no' it just said
encode all - encode - use all - use so I clicked encode all. I have burnt a copy and watched it, a few minor hitches but I am happy that I have 3 months worth of editing that I can watch and show my friends. Once again, thank you for your help.