search youtube videos with google library

<?php
require_once __DIR__ . '/vendor/autoload.php';

$DEVELOPER_KEY = 'YOUR_API_KEY';

$client = new Google_Client();
$client->setDeveloperKey($DEVELOPER_KEY);

// Define an object that will be used to make all API requests.
$youtube = new Google_Service_YouTube($client);

try {
  // Call the search.list method to retrieve results matching the specified
  // query term.
  $searchResponse = $youtube->search->listSearch('id,snippet', array(
    'q' => $_GET['q'],
    'maxResults' => $_GET['maxResults'],
  ));

  $videos = '';
  $channels = '';
  $playlists = '';

  // Add each result to the appropriate list, and then display the lists of
  // matching videos, channels, and playlists.
  foreach ($searchResponse['items'] as $searchResult) {
    switch ($searchResult['id']['kind'