How to Install iPASTORE TV & Other Apps on Apple TV 4th Gen
As you know Apple has disabled lot of things in latest TVOS, like ITMS Services which were used to install apps Over the Air, mobilconfig files which were used to Find UDID from device. No browser in the system.
So until the Apple TV Jailbreak arrives, we are only left with manual installation of iPA files.
To install Apps, to find UDiD you need to connect your Apple TV 4th Gen with your PC or Mac, to connect it requires a special USB – A to USB C cable.