An app I wrote¬†needed the following features: Application has to run in the browser as a SWF. Application will run in filesystem mode (file://). Application will not have server side (except for YouTube). Application will have to login to YouTube using ClientLogin¬†instead of AuthSub to avoid redirects. Application will have to upload a manipulated ByteArray, not directly from FileReference.browse(). First thing you do: Search Google for YouTube+Upload+ActionScript, which brings up Read more...