How to obtain a feed of comments entered through the 'chat' box during a YouTube live broadcast?

Question

The YouTube API enables users to obtain a comments feed, e.g. via https://gdata.youtube.com/feeds/api/videos/VIDEO_ID/comments?orderby=published.

Howeve

Answer 1

Ibrahim Ulukaya, a member of Google's Developer Relations team focusing on the YouTube API, stated the following on a similar quesiton (How to get chat content of Youtube live event in Java):

The API doesn't have connection to live chat at this moment. We are hoping to get that content incorporated into API soon.

via https://stackoverflow.com/a/26427743/1085891

Answer 2

I came Up with a Basic Script for this

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

namespace test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Starting();
        }

        public void Starting()
        {
            IWebDriver driver = new ChromeDriver();
            driver.Navigate().GoToUrl("https://www.youtube.com/watch?v=Yu5Om0SH3No");

            Thread.Sleep(10000);

            //Find Comments
            IWebElement element = driver.FindElement(By.ClassName("comment-text"));
            Console.WriteLine("Text: " + element.Text);

            //Find User names
            IWebElement element2 = driver.FindElement(By.XPath(".//*[@class='g-hovercard yt-uix-sessionlink yt-user-name']"));
            Console.WriteLine("Username: " + element2.Text);



        }
    }
}

Will Need More Hours Of Work To Make It Read the Page as The Comments Flow.

Answer 3

It is now possible to return chat messages for your own broadcasts using the LiveChatMessages endpoint as part of the YouTube Live Streaming API.

When creating a new liveBroadcast object, a liveChatId String will be returned as part of that liveBroadcast's snippet. Pass your broadcast's chat ID to LiveChatMessages/list endpoint's liveChatId parameter, and id, snippet, and authorDetails into the part parameter.

HTTP GET https://www.googleapis.com/youtube/v3/liveChat/messages?liveChatId={liveChatId}&part=id%2C+snippet%2C+authorDetails&key={YOUR_API_KEY}

This will return an array of liveChatMessage resources. The actual chat message is contained in the textMessageDetails dictionary as the value for the messageText key.

"textMessageDetails": {
  "messageText": string
}