can you help... in Pagination I modified View and Controller function

PHP Code:

    public function all()
    {

        // Pagination from https://www.codeigniter.com/userguide3/libraries/pagination.html
        $this->load->library('pagination');

        $config['base_url'] = 'http://localhost/repos/.../admin/videos/all/';

        $config['enable_query_strings'] = TRUE;


        $data['videos'] = $this->Video_model->get_list_public(); 

        $subject_options = array();
        $subject_options[0] = 'Select Subject';

        $subject_list = $this->Subject_model->get_list(16);   //  $this->user_id
        foreach ($subject_list as $subject) {
            $subject_options[$subject->id] = $subject->name;
        }

        $data['subject_options'] = $subject_options;


        $config['total_rows'] = count($data['videos']);
        $config['per_page'] = 2;
        
        $this->pagination->initialize($config);
        
        //echo $this->pagination->create_links();


        // Load Template
        $this->template->load('admin', 'default', 'videos/all', $data);
    }

PHP Code:

   <tr>
        <td><?php echo $video->id; ?></td>
        <td><a class="fancybox fancybox.iframe" href="http://www.youtube.com/embed/<?php echo $video->youtube_url; ?>"><img src="https://img.youtube.com/vi/<?php echo trim($video->youtube_url); ?>/0.jpg" style="width: 150px;"><br><?php echo $video->title; ?></a></td>
        <td><?php echo $subject_options[$video->subject_id]; ?></td>
        <td><?php echo $video->youtube_published_year; ?></td>
        <td><?php echo $formatted_date; ?></td>
        <td>
            <?php echo anchor('admin/videos/view/'.$video->id.'', 'View', 'class="btn btn-primary"'); ?>
        </td>
    </tr>
    <?php 
        endforeach;   
    ?>
</table>

<?php echo "<div id='paginationCI'>".$this->pagination->create_links()."</div>"; ?>

<?php else: ?>

    <p>No videos</p>

<?php endif; ?>

PHP Code:

// Controller
public function page() {
    $this->load->library('pagination');
    $config['base_url'] = base_url('admin/ads/page');
    $config['total_rows'] = $this->db->count_all('ads');
    $config['per_page'] = 50;
    $config['uri_segment'] = 4; // You may need to change this
    $this->pagination->initialize($config);
    
    // You need to change segment(4,1) so it's matching the same number as your uri_segment
    $offset = (intval($this->uri->segment(4,1))*$config['per_page'])-$config['per_page'];
    
    $this->data['ads'] = $this->ads_model->get_all_ads($config['per_page'],$offset);
    $this->load->view('admin/ads/list',$this->data);
}

// Model
public function get_all_ads($limit,$offset) {
    $this->db->order_by('company', 'ASC');
    $query = $this->db->get('ads',$limit,$offset);
    return $query->result();
}

// application/config/pagination.php - Default setttings
<?php
defined('BASEPATH') OR exit('No direct script access allowed');

$config['use_page_numbers'] = TRUE;
$config['full_tag_open'] = '<nav aria-label="Page navigation"><ul class="pagination">';
$config['full_tag_close'] = '</ul></nav>';
$config['prev_link'] = 'Prev.';
$config['next_link'] = 'Next';
$config['first_link'] = FALSE;
$config['last_link'] = FALSE;

$config['next_tag_open'] = '<li>';
$config['next_tag_close'] = '</li>';

$config['prev_tag_open'] = '<li>';
$config['prev_tag_close'] = '</li>';

$config['cur_tag_open'] = '<li><span>';
$config['cur_tag_close'] = '</span></li>';

$config['num_tag_open'] = '<li>';
$config['num_tag_close'] = '</li>';
$config['num_links'] = 4;