YouTube is not liable for copyright infringement because users have uploaded video material from Spanish television station Telecino, a Madrid court has ruled. YouTube is not obliged to monitor all content and weed out infringement, the court said. Telecino sued YouTube because of the presence of material in which it held copyright. A provisional ruling two years ago backed the television station and ordered YouTube to stop hosting any Telecino videos. But in a ruling issued this week, the court has said that YouTube is not responsible for the copyright infringement of the videos it hosts, though it must respond quickly to claims from copyright holders about particular videos.