At the time of uploading a video, YouTube users are shown a message asking them not to violate copyright laws. Despite this advice, there are still many <answer>unauthorized</answer> clips of copyrighted material on YouTube. YouTube does not view videos before they are posted online, and it is left to copyright holders to issue a DMCA takedown notice pursuant to the terms of the Online Copyright Infringement Liability Limitation Act. Three successful complaints for copyright infringement against a user account will result in the account and all of its uploaded videos being deleted.
Posting a video without consent of the copyright holder is what according to youtube?
unauthorized