Youtube APIから受け取ったJSONをGSONを使ってデコードしたい・・・

gistfile1.java

class YoutubeItemJson
{
	public String id;
	public String uploaded;
	public String updated;
	public String uploader;
	public String category;
	public String title;
	public String description;
	public List<String> tags;
	public List<String> thumbnail;
	public List<String> player;
	public class content
	{
		@SerializedName( "1" )
		public String Url_1;
		
		@SerializedName( "5" )
		public String Url_5;
		
		@SerializedName( "6" )
		public String Url_6;
	}
	
	public int duration;
	public String aspectRatio;
	public String recorded;
	public class accessControl
	{
		public String comment;
		public String commentVote;
		public String videoRespond;
		public String rate;
		public String embed;
		public String list;
		public String autoPlay;
		public String syndicate;
	}
	
}

public class YoutubeJson
{
	public String apiVersion;
	
	public class data
	{
		public String updated;
		public int totalItems;
		public int startIndex;
		public int itemsPerPage;

		public List<YoutubeItemJson> items;
	}
}