The new model of AppleTV can now install the VLC player. It is a full port of the player, but does not have cloud video support in it yet. They are planning on adding it. Right now you can play from LAN devices. I use the VLC player all the time on my PC since it plays just about anything…
Full story: http://9to5mac.com/2016/01/12/vlc-for-apple-tv-2/