Sorry that we still need few more days to test the ATV4 jailbreak. We will release an IPA which u need to sign it yourself to put it on ATV.
Pangu first announced the jailbreak a little over a week ago. It will only work on devices that are running the 9.0 or 9.0.1 firmware.
You can follow iClarified on Twitter, Facebook, Google+, or RSS to find out when it becomes available.