Speach lag help

I was going to burn my back up copy of the village for vacation this weekend and i used nero to find the directory of all the .vob vfiles. I clicked to add the whole directory cause that’s what i think your soppoed to do. when i was done i went to burn it and it said organiziing files and blah blah blah and it burnt with out a problem but when i put it in my dvd player their was a tremebdous speach lag?? any suggestions