ég er að cutta stuttmynd fyrir skólann en þegar ég importa videoið kemur þessi error

C:\Documents and Settings\Siggi Johann\My Documents\Downloads\AFV\AFV Americas Funniest Home Videos - Battle Of The Best_DVD Rip [by JCP].avi could not be imported. The required codec was not downloaded automatically because the Download codecs automatically check box is not selected in the Options dialog box.

hvað get ég gert ?