not getting next-page token about youtube HOT 2 CLOSED

        // Same Params as before
    $params = array(
        'q'             => 'Android',
        'type'          => 'video',
        'part'          => 'id, snippet',
        'maxResults'    => 10
    );

    // an array to store page tokens so we can go back and forth
    $pageTokens   = array();

    // make inital search
    $search       = Youtube::paginateResults($params, null);

    // store token
    $pageTokens[] = $search['info']['nextPageToken'];

    // go to next page in result
    $search       = Youtube::paginateResults($params, $pageTokens[0]);

    // store token
    $pageTokens[] = $search['info']['nextPageToken'];

    // go to next page in result
    $search       = Youtube::paginateResults($params, $pageTokens[1]);

    // store token
    $pageTokens[] = $search['info']['nextPageToken'];

    // go back a page
    $search       = Youtube::paginateResults($params, $pageTokens[0]);

    // add results key with info parameter set
    print_r($search['results']);