消息[禁止]位置[ - ]原因[禁止]域[youtube.video]

Question

我使用https://developers.google.com/youtube/v3/code_samples/dotnet#retrieve_my_uploads作为框架，并尝试更改每个视频的说明。我改变了两部分

credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
    GoogleClientSecrets.Load(stream).Secrets,
    // This OAuth 2.0 access scope allows for read-only access to the authenticated 
    // user's account, but not other types of account access.
    new[] { YouTubeService.Scope.YoutubeForceSsl },
    "user",
    CancellationToken.None,
    new FileDataStore(this.GetType().ToString())
);

和

foreach (var playlistItem in playlistItemsListResponse.Items)
{
    if (playlistItem.Snippet.Description.Contains("something"))
    {
        Console.WriteLine("{0} ({1})", playlistItem.Snippet.Title, playlistItem.Snippet.Description);
        Video video = new Video();
        VideoSnippet snippet = new VideoSnippet();
        VideoStatus status = new VideoStatus();
        snippet.Description = "new string";
        video.Snippet = snippet;
        video.Status = status;
        var videosUpdateRequest = youtubeService.Videos.Update(video, "snippet,status");
        Video response = videosUpdateRequest.Execute();
    }
}

但是我得到了

Error: Google.Apis.Requests.RequestError
Forbidden [403]
Errors [
        Message[Forbidden] Location[ - ] Reason[forbidden] Domain[youtube.video]
]

我该如何解决这个问题？