Guess what! Jim2102 has recently made the tutorial video for WooBle (World of Goo Ball Editor) and it is really useful! I recommend watching it if you want to make your own Goo Ball. There should also be text at the WooBle page where it says "My First Goo Ball - Tutorial", that should be a link, just like it is to the Level Editor. But anyway, there are now tutorial videos for the Ball and Level editors! Lets see if there will be a tutorial video for the movie editor!