Here is the command needed to type in after you ssh into your aTV.
Step #1 SSH into your aTV by typing: ssh root@ your ip address
Step #2 Enter your password – By default it’s alpine.
Step #3 Add this repository.
echo “deb http://apt.awkwardtv.org ./” > /etc/apt/sources.list.d/awkwardtv.list
Step #4 Type: apt-get update
Step #5 Type: apt-get install com.nito.nitoTV
Step #6 Type: killall AppleTV
That’s it now your aTV will reboot and bam, you should have NitoTV. which will allow you to install apps without having to ssh into your aTV.
You can also check out this video to see how to do it.