Search Keywords of Video

Mr. Ramco,

this may works: -

using RestSharp;
using System;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        // List to store the video details
        List listVideo = new List();

        // Create the REST client for the YouTube API
        var client = new RestClient("https://www.googleapis.com/youtube/v3");
        
        // Create the request for the search endpoint
        var searchRequest = new RestRequest("search", Method.GET);
        searchRequest.AddParameter("part", "snippet");
        searchRequest.AddParameter("type", "video");
        
        // Current date in the required format
        var currentDate = DateTime.UtcNow.Date.ToString("yyyy-MM-ddT00:00:00Z");
        searchRequest.AddParameter("publishedAfter", currentDate);
        searchRequest.AddParameter("order", "viewCount");
        searchRequest.AddParameter("key", "AIzaSethytrsAsidztyGul59UQ9b5LG8");
        
        // Execute the search request
        var searchResponse = client.Execute(searchRequest);
        var videoItems = searchResponse.Data.Items;

        // Loop through each video item to get the video details including tags
        foreach (var item in videoItems)
        {
            var videoId = item.Id.VideoId;
            var videoRequest = new RestRequest("videos", Method.GET);
            videoRequest.AddParameter("part", "snippet");
            videoRequest.AddParameter("id", videoId);
            videoRequest.AddParameter("key", "AIzaSethytrsAsidztyGul59UQ9b5LG8");
            
            // Execute the video request
            var videoResponse = client.Execute(videoRequest);
            var videoDetails = videoResponse.Data.Items[0];

            // Add the video details to the list
            listVideo.Add(videoDetails);
        }

        // Now listVideo contains details of each video including tags
    }

    public class VideoListResponse
    {
        public List Items { get; set; }

        public class Item
        {
            public Id Id { get; set; }
            public Snippet Snippet { get; set; }

            public class Id
            {
                public string VideoId { get; set; }
            }

            public class Snippet
            {
                public string Title { get; set; }
                public string Description { get; set; }
            }
        }
    }

    public class VideoDetailsResponse
    {
        public List Items { get; set; }
    }

    public class VideoDetails
    {
        public Snippet Snippet { get; set; }

        public class Snippet
        {
            public string Title { get; set; }
            public string Description { get; set; }
            public List Tags { get; set; }
        }
    }
}