Upload image & video on codeigniter - php

Question

I have some issue when I insert image and video on database, I am using codeigniter for program.
When I insert both a video and image, my code does not work, but if I upload only one of image/video it works fine.
How can I solve this issue to insert video and image?
My controller code:
private function _do_upload()
{
$config['upload_path'] = './assets/img/sni';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = 3000; //set max size allowed in Kilobyte
$config['max_width'] = 1000; // set max width image allowed
$config['max_height'] = 1000; // set max height allowed
$config['file_name'] = round(microtime(true) * 1000); //just milisecond timestamp fot unique name
$this->load->library('upload', $config);
if (!$this->upload->do_upload('image')) //upload and validate
{
$data['inputerror'][] = 'image';
$data['error_string'][] = 'Upload error: ' . $this->upload->display_errors('', ''); //show ajax error
$data['status'] = FALSE;
echo json_encode($data);
exit();
}
return $this->upload->data('file_name');
}
private function _do_upload_video()
{
$config['upload_path'] = './assets/img/sni';
$config['allowed_types'] = 'mp4';
$config['max_size'] = 9000148; //set max size allowed in Kilobyte
$config['file_name'] = uniqid(); //just milisecond timestamp fot unique name
$this->load->library('upload', $config);
if (!$this->upload->do_upload('video')) //upload and validate
{
$data['inputerror'][] = 'video';
$data['error_string'][] = 'Upload error: ' . $this->upload->display_errors('', ''); //show ajax error
$data['status'] = FALSE;
echo json_encode($data);
exit();
}
return $this->upload->data('file_name');
}
public function add_data()
{
$this->_validate();
$data = array(
'kode_process' => $this->input->post('kode'),
'process_name' => $this->input->post('name'),
'remark' => $this->input->post('remark'),
'category' => $this->input->post('category'),
'cycle_time' => $this->input->post('cycle'),
'smv' => $this->input->post('smv'),
'total' => $this->input->post('total'),
);
if (!empty($_FILES['image']['name'])) {
$upload = $this->_do_upload();
$data['image'] = $upload;
}
if (!empty($_FILES['video']['name'])) {
$upload = $this->_do_upload_video();
$data['video'] = $upload;
}
$this->Sni_model->save($data);
echo json_encode(array("status" => TRUE));
Screenshot: