I know. product is the game, the video of the editor is just for those who have not seen it in old thread (it shows the editor in 2009).
moreover it is a good example: if you make your own game specific editor, you can achieve more easily - and finally faster - what you want. and later can use it for further games, by continuous development of the same editor. sometimes it is enough to customize an existing game editor by plugins, sometimes requires a totally new one.