YouTube API .NET C# editing video problem

I use the newest YouTube API to upload movies by my users. Upload works but I have problem with editing properties after that. I'm trying like this:

YouTubeRequestSettings settings = new YouTubeRequestSettings("NETUnittests", YTDeveloperKey, YTUser, YTPassword);settings.Timeout = 10000000;YouTubeRequest request = new YouTubeRequest(settings);Google.YouTube.Video video = new Google.YouTube.Video();//video.VideoId = lblVideoID.Text;//http://gdata.youtube.com/feeds/api/users/USER_ID/uploads/VIDEO_IDUri videoEntryUrl = new Uri("http://gdata.youtube.com/feeds/api/videos/" + lblVideoID.Text);video = request.Retrieve<Google.YouTube.Video>(videoEntryUrl);if (video.ReadOnly == false){}string tt = video.Title;string dd = video.Description;video.Title = tbTitle.Text;video.Description = tbDescription.Text;video.Keywords = tbKeywords.Text;//video.Status.Value = "private";request.Update(video);

First of all video.ReadOnly = true so I the object is uneditable. When I'm trying to perform request.Update(video); I get an error that Object is not found - something like that. What is missing?