How to stream non-mp4 videos to atv2: (Please note none of the programs listed are mine, I only use them and am assembling this guide so others can easily stream videos to the ATV2. I take no responsibility for anything.) What this program does it transcodes the video into mp4 (using VLC) and streams it at the same time. This is why you computer fan will turn on while playing it. Requirements: Mac OSX 10.6 (Snow Leopard) Apple TV Generation 2 (ATV2) You need 2 programs: Airflick (download it from: http://ericasadun.com/ftp/AirPlay/ , please note that it could get upgraded to fix some bugs so I would recommend checking for new versions) VLC (download it from http://www.videolan.org/vlc/ , please note it must be located in your Applications folder) Now all you have to do is open Airflick, select your AppleTV, drag in the video you want to send to it and press play. It should take a few seconds (10-30 seconds) as it starts to transcode it before it streams and then you should be good. If you are having trouble try pressing menu on the ATV2 until you get to the main menu then try streaming. Enjoy your video and let me know what you think of the quality. I notice that it seems to work pretty well if you have the bandwidth.