我放弃了直接上传.现在我尝试了可恢复的上传方式.我的代码如下.

YouTubeRequest request;
YouTubeRequestSettings settings = new YouTubeRequestSettings("YouTube Upload",Client Key,"Username","Password");
request = new YouTubeRequest(settings);
Video newVideo = new Video();

ResumableUploader m_ResumableUploader = null;
Authenticator YouTubeAuthenticator;

m_ResumableUploader = new ResumableUploader(256); //chunksize 256 kilobyte
m_ResumableUploader.AsyncOperationCompleted += new AsyncOperationCompletedEventHandler(m_ResumableUploader_AsyncOperationCompleted);
m_ResumableUploader.AsyncOperationProgress += new AsyncOperationProgressEventHandler(m_ResumableUploader_AsyncOperationProgress);

YouTubeAuthenticator = new ClientLoginAuthenticator("YouTubeUploader",ServiceNames.YouTube,"kjohnson@resoluteinnovations.com","password");

//AtomLink link = new AtomLink("http://uploads.gdata.youtube.com/resumable/Feeds/api/users/uploads");
//link.Rel = ResumableUploader.CreateMediaRelation;
//newVideo.YouTubeEntry.Links.Add(link);

System.IO.FileStream stream = new System.IO.FileStream(filePath,System.IO.FileMode.Open,System.IO.FileAccess.Read);

byte[] chunk = new byte[256000];int count = 1;
while (true) {
    int index = 0;
    while (index < chunk.Length) {
        int bytesRead = stream.Read(chunk,index,chunk.Length - index);
        if (bytesRead == 0) {
            break;
        }
        index += bytesRead;
    }
    if (index != 0) { // Our prevIoUs chunk may have been the last one
        newVideo.MediaSource = new MediaFileSource(new MemoryStream(chunk),filePath,"video/quicktime");
        if (count == 1) {
            m_ResumableUploader.InsertAsync(YouTubeAuthenticator,newVideo.YouTubeEntry,new MemoryStream(chunk));
            count++;
        }
        else
            m_ResumableUploader.ResumeAsync(YouTubeAuthenticator,new Uri("http://uploads.gdata.youtube.com/resumable/Feeds/api/users/uploads"),"POST",new MemoryStream(chunk),"video/quicktime",new object());
    }
    if (index != chunk.Length) { // We didn't read a full chunk: we're done
        break;
    }
}

谁能告诉我有什么问题？我的2 GB视频无法上传.