I am having trouble importing downloaded video into Windows Movie Maker. Everytimt I try I get this up:
C:\Documents and Settings\New User\My Documents\My Videos\Veoh\Vampireknightepisode1.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.
Please help! 
You may require an .xvid or .mp3 codec.
That is unless veoh encodes them with something else, like what vodei does.
xvid: http://www.xvid.org/Downloads.15.0.html
Mp3: http://lame.sourceforge.net/
Also try virtualdubmod instead. It’s a much better editor...
http://sourceforge.net/project/downloading.php?group_id=65889&filename=VirtualDubMod_1_5_10_2_b2542.zip
Open windows Movie Maker go to Tools, Options then tick the box they are telling you to tick