To add a private or beta channel you must first get a code from the channel developer.
Second, you must have a Roku account, and you must be logged in. This ensures that unauthorized users cannot add a private channel to your Roku player without your consent.
Third, you enter the code provided by the channel developer here. After linking, the private or beta channel will appear on your Roku player’s home screen, alongside your other channels (like Netflix, Amazon Video On Demand, etc).