setting mimes

setting mimes
public function simpan_video()
    {
        $this->load->model('m_video');

        $id_user = $this->input->post('id_user');
        $id_marker = $this->input->post('id_marker');
        $id_paket = $this->input->post('id_paket');

        //cek video apakah sudah pernah di upload
        //jika belum set limit
        $cek_video_upload = $this->m_video->cek_video_upload($id_user, $id_marker);
        if($cek_video_upload <= 0)
        {
            //cari id pembelian
            $cari = $this->m_video->cari_id_pembelian($id_user, $id_paket);
            foreach ($cari->result() as $row) {
                $id_pembelian = $row->id_pembelian;
            }

            //set limit
            $this->m_video->set_limit($id_pembelian,$id_paket);
        }


        if(isset($_FILES["video"]["name"]))
        {
            $date = date("ymd");
            $configVideo['upload_path'] = $_SERVER['DOCUMENT_ROOT'].'./assets/videos';
            $configVideo['max_size'] = '40000';
            $configVideo['allowed_types'] = 'mp4';
            $configVideo['overwrite'] = FALSE;
            $configVideo['remove_spaces'] = TRUE;
            $configVideo['file_name'] = rand().".mp4";

            $data['nama_file'] = $configVideo['file_name'];
            $data['status'] = '1';
            $data['id_pemilik'] = $id_user;
            $data['id_marker'] = $id_marker;
            $data['judul'] = $this->input->post('judul');

            $this->load->library('upload', $configVideo);
            $this->upload->initialize($configVideo);
            if(!$this->upload->do_upload('video'))
            {

                echo $this->session->set_flashdata('msg', $this->upload->display_errors('',''));
                // redirect('video/upload_video');
                echo $this->upload->display_errors('','');
            }
            else
            {
                $res = $this->m_video->insert_video($data);
                if($res)
                {
                    echo "Berhasil!";
                }
                else
                {
                    echo "Gagal!";
                }
            }
        }
        else
        {
            echo "gagal";
        }
    }