I've been used to using my iOS devices to play video media on my Apple TV (mainly: tv channels, HBO Nordic and Plex). Of course, I was absolutely thrilled to find out that it would be possible to use AirPlay in Safari in El Capitan. Now it's here and I find it pretty useless. So few sites/players are supported. I've only come across Vimeo and YouTube – which have separate apps for the Apple TV anyway. Have I missed something? What good is this feature?