This video shows how you can set up and control your Apple TV 4
If you LOST APPLE TV REMOTE and do not have it to pair the app, you can use any other remote (including infrared), paired to your Apple TV before to set up CiderTV.
If NO OTHER REMOTES are paired to your Apple TV, but you have Mac – you can use CiderTV for MAC to control Apple TV or to pair CiderTV for Android.
for iOS – https://itunes.apple.com/ru/app/cidertv-by-ezzi-remote-control/id1017677047?mt=8
for Android – https://play.google.com/store/apps/details?id=com.ezzi.cidertv
FAQ cidertv.com/faq or firstname.lastname@example.org