private async Task Run()
        {
            UserCredential credential;
            using (var stream = new FileStream(Server.MapPath("client_secrets.json"), FileMode.Open, FileAccess.Read))
            {
                var secrets = GoogleClientSecrets.Load(stream).Secrets;

                GoogleAuthorizationCodeFlow.Initializer initializer = new GoogleAuthorizationCodeFlow.Initializer
                {
                    ClientSecrets = secrets
                };

                var scopes = new[] { Google.Apis.YouTube.v3.YouTubeService.Scope.YoutubeUpload };
                Google.Apis.Util.Store.IDataStore dataStore = null;
                var user = "user";

                initializer.Scopes = scopes;
                initializer.DataStore = (dataStore ?? new Google.Apis.Util.Store.FileDataStore(Google.Apis.Auth.OAuth2.GoogleWebAuthorizationBroker.Folder, false));
                GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow(initializer);

                var codeReceiver = new WebCodeReceiver();
                codeReceiver.RedirectUri = "http://localhost:2627/oauth2callback/";
                credential = await new Google.Apis.Auth.OAuth2.AuthorizationCodeInstalledApp(flow, codeReceiver).AuthorizeAsync(user, CancellationToken.None).ConfigureAwait(false);


            }

            var youtubeService = new YouTubeService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential,
                ApplicationName = Assembly.GetExecutingAssembly().GetName().Name
            });

            var video = new Video();
            video.Snippet = new VideoSnippet();
            video.Snippet.Title = titleBox.Text;
            video.Snippet.Description = DescriptionBox.Text;
            video.Snippet.Tags = new string[] { "tag1", "tag2" };
            video.Snippet.CategoryId = "22"; // See https://developers.google.com/youtube/v3/docs/videoCategories/list
            video.Status = new VideoStatus();
            video.Status.PrivacyStatus = "unlisted"; // or "private" or "public"
            //if (FileUpload1.HasFile)
            //{
                var filePath = Server.MapPath("~/Uploads/22.mp4");
                FileUpload1.SaveAs(filePath);

                using (var fileStream = new FileStream(filePath, FileMode.Open))
                {
                    var videosInsertRequest = youtubeService.Videos.Insert(video, "snippet,status", fileStream, "video/*");
                    videosInsertRequest.ProgressChanged += videosInsertRequest_ProgressChanged;
                    videosInsertRequest.ResponseReceived += videosInsertRequest_ResponseReceived;

                    await videosInsertRequest.UploadAsync();
                }
            //}
        }

        void videosInsertRequest_ProgressChanged(Google.Apis.Upload.IUploadProgress progress)
        {
            switch (progress.Status)
            {
                case UploadStatus.Uploading:
                    Response.Write(string.Format("{0} bytes sent.", progress.BytesSent));
                    break;

                case UploadStatus.Failed:
                    Response.Write(string.Format("An error prevented the upload from completing.\n{0}", progress.Exception));
                    break;
            }
        }

        void videosInsertRequest_ResponseReceived(Video video)
        {
            Response.Write(string.Format("Video id '{0}' was successfully uploaded.", video.Id));
        }