The NFL is launching a brand new Connected TV App for the 2019 Season.
Game Pass users will need to sign into their account to view Game replays.
To sign in, select the gear wheel on the right side of the app
Once in settings, select NFL.COM & NFL GAME PASS
The sign in screen will give you the option to PURCHASE GAME PASS, SIGN IN, and RESTORE IN APP PURCHASES
PURCHASE GAME PASS
This option will allow users to purchase a subscription to NFL GAME PASS. 
SIGN IN
Sign in to your NFL.com account and link your Game Pass subscription by entering the activation code:
RESTORE PURCHASE
Link your account to a purchase made in the app store.
HOW TO WATCH GAME REPLAYS:
NFL content will begin to play as soon as your app loads. Select MENU To access games, highlights, and analysis.
The Menu will have two sections: FEATURED and GAMES.
To watch a game replay, Select:
GAMES
Once in the game section the option to select the week and the year will be on the right of the menu.
Once in your desired week and season, scroll down to select the game you wish to view
You will have the option to watch the full replay, the condensed replay, and coaches film*
* Coaches film is uploaded every Tuesday after all games are complete