6. Edit movie artwork
You can now add album artwork for music tracks for your imported movies and television shows as well. You can do this by replacing the miscellaneous thumbnails found by iTunes to get the video collection you wish for looking much better.
To do this you must find Get Info dialog and switch to the Artwork tab and then you can load DVD or Blu-ray case cover, the official movie poster, or even your favorite frame from the movie to represent the file in your iTunes library. However this will not work for official content bought from iTunes but only for your own imported videos.