using System;

using System.Threading.Tasks;

using System.Net.Http;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        RunTest().GetAwaiter().GetResult();

        Console.WriteLine("Hello World");

    }

    public async static Task RunTest()

    {

        using (HttpClient client = new HttpClient())

        {

            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

            var response = await client.GetAsync("https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&key=<<Your Key>>&playlistId=PL-PXKb5jSjwbU0wzAuEooBvkZ9jnmXR7N");

            var content = await response.Content.ReadAsStringAsync();

            Console.WriteLine(content);

            JObject jObject = JObject.Parse(content);

            var videoIds = jObject.SelectTokens("$...videoId");

            foreach (var videoId in videoIds)

            {

                Console.WriteLine(videoId.Value<string>());

            }

        }

    }

}