Getting error on deserializing json in metro app

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C#

Metro-design

YouTube

Hi,
I am working in a metro app to show youtube videos and user can play or rate video. I am using this uri
http://gdata.youtube.com/feeds/api/videos/ADos_xW4_J0?v=2&alt=jsonc

and get json response but now when I am trying to deserialize it into c# class I am getting error. I am using newtonsoft to convert json to class.

Method which I am using is

public static T Deserialize<T>(string json)
{
    T obj = Activator.CreateInstance<T>();
    using (MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(json)))
    {
        obj = (T)JsonConvert.DeserializeObject(json, obj.GetType());
        return obj;
    }
}

This method convert json data to c# class.
Is there any other way to get video details from youtube.

[Edit]Code block added[/Edit]