We cannot help with the xvid movie that you downloaded and tried to burn to a disk. Its not that we want to aggravate you, its just against the rules of the forum to help with copyright protected material being copied or converted to another format without a legal basis for doing so. If you had bought the movie in xvid avi format or as a dvd or blu ray disk, we would be quite happy to help.
My suggestion is to try a simple data burn (nothing illegal!) using Nero and these particular disks you have. If it fails again, post the log from this latest failure.