1) On the home screen, select "Apps" and scroll down on the menu to the "search" option:
2) Click on the search button and type in "Angel Studios".
3) Click on "Angel Studios" in the available options and select "Install" to add the TV app. (The version you will see on Google TV will not say Beta as below)
4) After it installs, it will then be available on your Home Screen within your list of apps.
You can now open the app and watch.