Please <a href='https://accounts.google.com/o/oauth2/v2/auth?response_type=code&access_type=offline&client_id=12121412916-0jlob36qko6ev6ja5e5icvlm4foe7mps.apps.googleusercontent.com&redirect_uri=https%3A%2F%2Fvidune.ir%2Foauth2callback.php&state&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fyoutube.readonly&prompt=select_account%20consent'>authorize</a> the application.