The unpack manager works quite similiarly when working with video files except in so much that it typicallty only uses two files: the video file itself and the main icon file. If you don't already have an icon file, you can use a tool like xine or mplayer to play the start of the movie and save a suitable screen capture. This file should then be resized down to a more reasonable icon size and saved with the same name as the movie file itself but with a suitable image file extension rather than the video one. Therefore if your video file is called Roxanne-KnittedTopWhiteSkirt.wmv, then the icon for it should be called Roxanne-KnittedTopWhiteSkirt.jpg.