Tumblr, the American social networking site, has said it does not regard itself as a video platform, as it became the second company to challenge the Irish media regulator in the courts. A spokesperson has told the Irish Independent that Tumblr respects the “important work” being done by Coimisiún na Meán and its role in online safety, but does not accept being designated as a video-sharing platform by the regulator. “Users come to us for lots of great content – memes and fandom - but video is a very small part of Tumblr,” its spokesperson said. “We do not believe that we...