Nero: Movie burning help

Hello, when I use Nero 7 to burn movies (avi format), while im burning the movie…theres a mini window that shows the movie while its burning but the movie is laggy…is there a way to get rid of it? because when I play it back in my dvd it is choppy and laggy also :confused: . I use TY DVD-R to burn movies on btw, any help? thanks