Download a video from the remote node

        :param video_url: video url
        :param video_name: video name

def _download_video(self, video_url, video_name):
        """Download a video from the remote node

        :param video_url: video url
        :param video_name: video name
        """
        filename = '{0:0=2d}_{1}'.format(DriverWrappersPool.videos_number, video_name)
        filename = '{}.mp4'.format(get_valid_filename(filename))
        filepath = os.path.join(DriverWrappersPool.videos_directory, filename)
        if not os.path.exists(DriverWrappersPool.videos_directory):
            os.makedirs(DriverWrappersPool.videos_directory)
        response = requests.get(video_url)
        open(filepath, 'wb').write(response.content)
        self.logger.info("Video saved in '%s'", filepath)
        DriverWrappersPool.videos_number += 1