vnc – Virtual Network Computing – in full, is a software that can establish a remote connection and take full control of the machine where you installed the server,
in our case, Apple TV, to administer it remotely from a PC / Mac, from iPad and iPhone via vnc the right applications.

Are based on this principle all the applications we use to remotely control our Apple TV, but unlike other “vnc” allows us to see the screen of Apple TV and decide what to do.

More detail from here How to install and set up VNC on Apple TV
Read the full story here How to install and set up VNC on Apple TV