YouTube has scored a legal victory in its copyright case with Viacom. A US district court has ruled that the video-sharing site and its parent company Google complied with the “safe harbour” requirements of the Digital Millenium Copyright Act. The ruling strikes down Viacom’s USD 1bn legal action against YouTube, which the media giant accuses of profiting from trade in pirated videos of Viacom television programmes. Dating back to early 2007, Viacom had accused Google of allowing hundreds of thousands of Viacom-owned video clips to be posted to the site and gathering advertising profits from the video traffic. The case was among the largest of YouTube’s remaining legal battles, and had recently turned ugly when the two firms accused one another of blackmail and fabricating copyright infringement cases. Viacom said that it will be appealing the decision.