public virtual async Task <VideoOperation> FaceDetectionAndTrackingAsync(string videoUrl)
        {
            try {
                var result = await VideoRepository.FaceDetectionAndTrackingAsync(videoUrl);

                return(result);
            } catch (Exception ex) {
                Logger.Error("VideoService.FaceDetectionAndTrackingAsync failed", this, ex);
            }

            return(null);
        }