VideoState isn't a class. Video is and VideoEvent is. :)
Furthermore, the (*) wildcard loads all the classes from that package, so you don't need to import the classes individually.
Use VideoEvent.COMPLETE instead.
General notice: from now on, I would like to ask everyone to put [AS2] or [AS3] (corresponding to the version of actionscript you are using on your project) in front of their post titles when the question is actionscript related! Please help us help you faster. Thank you.