YouTube API - insert

Question

To kod PHP youtubowego api służący do wysyłania filmów:

if (!file_exists(__DIR__ . '/vendor/autoload.php')) {
  throw new Exception(sprintf('Please run "composer require google/apiclient:~2.0" in "%s"', __DIR__));
}
require_once __DIR__ . '/vendor/autoload.php';

$client = new Google_Client();
$client->setApplicationName('API code samples');
$client->setScopes([
    'https://www.googleapis.com/auth/youtube.upload',
]);

// TODO: For this request to work, you must replace
//       "YOUR_CLIENT_SECRET_FILE.json" with a pointer to your
//       client_secret.json file. For more information, see
//       https://cloud.google.com/iam/docs/creating-managing-service-account-keys
$client->setAuthConfig('YOUR_CLIENT_SECRET_FILE.json');
$client->setAccessType('offline');

// Request authorization from the user.
$authUrl = $client->createAuthUrl();
printf("Open this link in your browser:\n%s\n", $authUrl);
print('Enter verification code: ');
$authCode = trim(fgets(STDIN));

// Exchange authorization code for an access token.
$accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
$client->setAccessToken($accessToken);

// Define service object for making API requests.
$service = new Google_Service_YouTube($client);

// Define the $video object, which will be uploaded as the request body.
$video = new Google_Service_YouTube_Video();

// Add 'snippet' object to the $video object.
$videoSnippet = new Google_Service_YouTube_VideoSnippet();
$videoSnippet->setCategoryId('22');
$videoSnippet->setDescription('Description of uploaded video.');
$videoSnippet->setTitle('Test video upload.');
$video->setSnippet($videoSnippet);

// Add 'status' object to the $video object.
$videoStatus = new Google_Service_YouTube_VideoStatus();
$videoStatus->setPrivacyStatus('private');
$video->setStatus($videoStatus);

// TODO: For this request to work, you must replace "YOUR_FILE"
//       with a pointer to the actual file you are uploading.
//       The maximum file size for this operation is 128GB.
$response = $service->videos->insert(
  'snippet,status',
  $video,
  array(
    'data' => file_get_contents("YOUR_FILE"),
    'mimeType' => 'video/*',
    'uploadType' => 'multipart'
  )
);
print_r($response);

Pojawił się błąd o niezdefiniowanej stałej "STDIN".

Dodałem: 

define('STDIN',fopen("php://stdin","r"));

Teraz myśli, i myśli i tak bez końca się ładuje.

Nie może przejść przez tą linie 

$authCode = trim(fgets(STDIN));

Jest ktoś obcykany w YouTube API?