1. Send (Stream) your movie from your computer to Apple TV .
Any movie that’s playing on your laptop or iMac can be ‘streamed’ to your Apple TV.
Once your Apple TV is turned on, a new ‘Airplay’ icon will appear in your menubar.
Click on it and select Apple TV. This will ‘mirror’ all that’s on your screen to the Apple TV, as well as the sound. (Make the movie full screen for it to fill the Apple TV.)
2. Browse to the movie from Apple TV.
To do this you firstly need to turn on ‘Home Sharing’ in iTunes on your computer.
Now in Apple TV go to ‘Computers’ and you will be able to navigate via the remote to any movie in your iTunes library. (The computer needs to be on with iTunes open.)
Playing files from a network drive
If you have some kind of external hard drive or network drive full of movies, all you need to do is drag the movies into iTunes on your laptop or desktop computer and they will appear in the Apple TV menu for that computer. Make sure you turn off the ‘Copy files to iTunes’ box when you do this or it will try to copy all the movies to your computer!