Now that you’ve previewed your app, move on to test before it goes live to ensure the look, feel, and functionality is ready for launch. To test your app, you will use a test version of your app on a TV that's connected to Roku.
Create and access your Roku Developer account; learn more here.
Link Your Roku TV
Connect your Roku to your TV and make sure it is connected to the internet. Follow the prompts to set up your Roku. Once that is complete, your device will provide you with a Link Code. You can also refer to this Roku Support Document.
Visit https://my.roku.com/link on your web browser in order to link your Roku device to your developer account
Add your channel to Roku.
Navigate to the Roku Developer Dashboard and select My Channels under Channel.
Next to your app, select Preview & Update.
Click the code next to Access Code (not Vanity Access Code). Follow Roku's prompt to install your channel onto your device.