Youtube API Token Expire while long time upload

问题

I am using following script to upload a video to my youtube Channel. https://github.com/youtube/api-samples/blob/master/php/resumable_upload.php

Everything works fine now, except if i want to upload a large video what takes around 1,5 - 2,5 hours upload.

During the Upload, the Token Expire after 60 minutes and it seems the script stops working after upload.

So everything what is planed after the upload loop stops working (thumbnail, next video, etc)

This is the upload loop:

        while (!$status && !feof($handle)) {

            $chunk = fread($handle, $chunkSizeBytes);
            $status = $media->nextChunk($chunk);

            $sizecount = $sizecount+$chunkSizeBytes;

            $fp = fopen('./include/status.txt', "w");
            fwrite($fp, $sizecount);
            fclose($fp);

        }

My work Around at the moment: <meta http-equiv="refresh" content="600">

So yeah the site reload every 10 minutes, get token again and resume the upload.

I Think this is a bad way to handle this but i do not realy understand "session" and "token" and this stuff. Is there a better way to make a long live token or refresh the token?

I allready made this change so i got a refresh token in token array:

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

This is new:

$client->setAccessType("offline");
$client->setApprovalPrompt("force");

That seems to give me a refresh token, but i do not know how to handle it or put a refresh command into this "while" loop

How can i refresh the token while uploading?

my first thought was to put the start of this script where i get the token again into while loop:

        while (!$status && !feof($handle)) {

            $chunk = fread($handle, $chunkSizeBytes);
            $status = $media->nextChunk($chunk);

            $sizecount = $sizecount+$chunkSizeBytes;

            $fp = fopen('./include/status.txt', "w");
            fwrite($fp, $sizecount);
            fclose($fp);

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


            $youtube = new Google_Service_YouTube($client);

            $tokenSessionKey = 'token-' . $client->prepareScopes();
            if (isset($_GET['code'])) {
                if (strval($_SESSION['state']) !== strval($_GET['state'])) {
                    die('The session state did not match.');
                }

                $client->authenticate($_GET['code']);
                $_SESSION[$tokenSessionKey] = $client->getAccessToken();
                header('Location: ' . $redirect);
            }

            if (isset($_SESSION[$tokenSessionKey])) {
                $client->setAccessToken($_SESSION[$tokenSessionKey]);
            }
        }

But this cant be correct?! it would start to get the token every 1MB Chunk. That would mean around 5000 times while uploading the video!