Traffic Search Keywrods

Question

Hi

  I am tryting to get Video Traffic search keywords but it is returning null. Below is the code

var client = new RestClient("googleapis.com/youtube/analytics/v1/reports");
            var request = new RestRequest("query", Method.GET);


            request.AddParameter("metrics", "views");
            request.AddParameter("dimensions", "insightTrafficSourceType,insightTrafficSourceDetail");
            request.AddParameter("key", "AKTJSLLSHYGSJGJS8");
            request.AddParameter("dimensions", "insightTrafficSourceType,insightTrafficSourceDetail");

            var response = client.Execute(request);

Thanks