Most codes are valid for only 10–15 minutes. If it expires, restart the app to generate a new one.
This article provides a comprehensive guide to finding the right activation link, using a code for activation, and troubleshooting common issues. What is an HDTV App Activation Code? hdtv app activation code link
Open the App Store on your Apple TV to download the network app. Open the app and select the activation option. Most codes are valid for only 10–15 minutes