If you've wanted nothing more than to sling web videos from your Windows 10 PC to your TV, today's a very big day. Microsoft has released a Windows 10 Insider Preview build that gives early adopters (specifically, those on the Fast ring) the ability to cast media in Edge. The web browser now sends audio, photos and videos to any DLNA- or Miracast-capable device (an Xbox One should do it) on your network, whether it's a YouTube clip or a Pandora radio stream. There is a big gotcha, unfortunately: copy-protected content won't work, so don't expect to put Netflix on the big screen. Even so, it's good to have an alternative to Google's Chrome browser, Cast API and Chromecast hardware for easily sharing web content with the rest of your home.