How to remember authorization in Google when sending a video to YouTube?

Question

PHP

Using the script below, I send the video directly to YouTube, after an hour the authorization is reset and I have to go through it again.
I created the file the_key.txt, in which I save the authorization token and refresh_token in a line to update the authorization token.
Approximate file content

{"access_token":"XXXXXXXXX","token_type":"Bearer", "expires_in":3600, "refresh_token":"XXXXXXX", "created":000000}

As a result, after adding, $key = file_get_contents('the_key.txt');I get the error Failed to start the resumable upload (HTTP 403: global, Insufficient Permission).
Apparently authorization according to my data does not work, although the_key.txt file is successfully updated every hour.
Please help me find the error, most likely I am not trying to get the authorization data from the token file correctly.
Thank you!
Script code:

<?php
set_time_limit(0);
/**
 * upload videos with php on youtube
 * @author Deepak S.P at Codeniters.com
*/

$key = file_get_contents('the_key.txt');

require_once 'google-api/src/Google/autoload.php';


/*
 * You can acquire an OAuth 2.0 client ID and client secret from the
 * Google Developers Console <https://console.developers.google.com/>
 * For more information about using OAuth 2.0 to access Google APIs, please see:
 * <https://developers.google.com/youtube/v3/guides/authentication>
 * Please ensure that you have enabled the YouTube Data API for your project.
 */
$OAUTH2_CLIENT_ID = '...';
$OAUTH2_CLIENT_SECRET = '...';

$client = new Google_Client();
$client->setClientId($OAUTH2_CLIENT_ID);
$client->setClientSecret($OAUTH2_CLIENT_SECRET);
$client->setScopes('https://www.googleapis.com/auth/youtube');
$redirect = filter_var('https://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'], FILTER_SANITIZE_URL);

$client->setRedirectUri($redirect);
// Define an object that will be used to make all API requests.
$youtube = new Google_Service_YouTube($client);
if (isset($_GET['code'])) {
if (strval($_SESSION['state']) !== strval($_GET['state'])) {
var_dump($_SESSION['state']);
var_dump($_GET['state']);
    die('The session state did not match.');
}
$client->authenticate($_GET['code']);
$_SESSION['token'] = $client->getAccessToken();
header('Location: ' . $redirect);
}





//if (isset($_SESSION['token'])) {
//$client->setAccessToken($_SESSION['token']);
//}

if (isset($key)) {
$client->setAccessToken($key);
}





// Check to ensure that the access token was successfully acquired.
if ($client->getAccessToken()) {





        if($client->isAccessTokenExpired()) {
            $newToken = json_decode($client->getAccessToken());
            $client->refreshToken($newToken->refresh_token);
            file_put_contents('the_key.txt', $client->getAccessToken());
        }





try{
// REPLACE this value with the path to the file you are uploading.
$videoPath = 'video/'.$videoName;
// Create a snippet with title, description, tags and category ID
// Create an asset resource and set its snippet metadata and type.
// This example sets the video's title, description, keyword tags, and
// video category.
$snippet = new Google_Service_YouTube_VideoSnippet();
$snippet->setTitle($videoTitle);
$snippet->setDescription($videoInfo);
$snippet->setTags(array("tag1", "tag2"));
// Numeric video category. See
// https://developers.google.com/youtube/v3/docs/videoCategories/list
$snippet->setCategoryId("22");
// Set the video's status to "public". Valid statuses are "public",
// "private" and "unlisted".
$status = new Google_Service_YouTube_VideoStatus();
$status->privacyStatus = "public";
// Associate the snippet and status objects with a new video resource.
$video = new Google_Service_YouTube_Video();
$video->setSnippet($snippet);
$video->setStatus($status);
// Specify the size of each chunk of data, in bytes. Set a higher value for
// reliable connection as fewer chunks lead to faster uploads. Set a lower
// value for better recovery on less reliable connections.
$chunkSizeBytes = 1 * 1024 * 1024;
// Setting the defer flag to true tells the client to return a request which can be called
// with ->execute(); instead of making the API call immediately.
$client->setDefer(true);
// Create a request for the API's videos.insert method to create and upload the video.
$insertRequest = $youtube->videos->insert("status,snippet", $video);
// Create a MediaFileUpload object for resumable uploads.
$media = new Google_Http_MediaFileUpload(
$client,
$insertRequest,
'video/*',
null,
true,
$chunkSizeBytes
);
$media->setFileSize(filesize($videoPath));
// Read the media file and upload it chunk by chunk.
$status = false;
$handle = fopen($videoPath, "rb");
while (!$status && !feof($handle)) {
$chunk = fread($handle, $chunkSizeBytes);
$status = $media->nextChunk($chunk);
}
fclose($handle);
// If you want to make other calls after the file upload, set setDefer back to false
$client->setDefer(false);
$htmlBody = "<h3>Видео успешно загружено на YouTube</h3><br /><div>";
$htmlBody .= sprintf('<p>%s (%s)</p>',
$status['snippet']['title'],
$status['id']);
$htmlBody .= '</div>';
} catch (Google_ServiceException $e) {
$htmlBody .= sprintf('<p>A service error occurred: <code>%s</code></p>',
htmlspecialchars($e->getMessage()));
} catch (Google_Exception $e) {
$htmlBody .= sprintf('<p>An client error occurred: <code>%s</code></p>',
htmlspecialchars($e->getMessage()));
}
$_SESSION['token'] = $client->getAccessToken();
} else {
// If the user hasn't authorized the app, initiate the OAuth flow
$state = mt_rand();
$client->setState($state);
$_SESSION['state'] = $state;
$authUrl = $client->createAuthUrl();
$htmlBody = <<<END
<h3>Authorization Required</h3>
<p>You need to <a href="$authUrl">authorize access</a> before proceeding.<p>
END;
}
?>
<!doctype html>
<html>
<head>
<title>Video Uploaded</title>
</head>
<body>
<?=$htmlBody?>
</body>
</html>

Answer 1

Log in with service account key file