Just go to the apple store and search for Smarters player lite.
After finding the app click on it and install. Wait till it gets installed on your apple tv.
Step1= Open IPTV Smarters Player
Step 2= Accept the User Terms and Conditions
Step 3= Choose the Login Method: XTREAM API
Step 3= Enter the login details sent to you from your IPTV Provider.
Any name: Choose a name for the playlist
Username: ………….
Password: ………….
URL: ………….
Click ADD USER
After downloading gets finished, the channels list will be shown on your dashboard. Here you can pick the option to watch live channels or you can pick VOD also.