YouTube Restore Dislike Counters

// ==UserScript==
// @name         YouTube Restore Dislike Counters
// @version      1.2.2
// @description  A userscript to restore the dislike counts on YouTube. Not 100% accurate all the time, but stil pretty accurate.
// @author       syndiate / me (bernd)
// @match        *://www.youtube.com/*
// @run-at       document-start
// @downloadURL  https://pastebin.com/raw/Vrz7efY7
// @updateURL    https://pastebin.com/raw/Vrz7efY7
// ==/UserScript==

;(function (window, document, undefined) {
    var ButonRendererSelector = "yt-formatted-string#text.ytd-toggle-button-renderer";

    function numberWithCommas(num) {
        return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
    }

    async function waitForElm(ele) {
        while (!document.querySelector(ele))
            await new Promise(x => requestAnimationFrame(x));
        return;
    }

    async function init() {
        try {
            // Get Data (server data on likes/dislikes)
            var data = document.querySelector("ytd-app").data,
                topLevelButtonsData = data.response.contents.twoColumnWatchNextResults.results.results.contents.filter(obj => {
                        return obj['videoPrimaryInfoRenderer'] !== void 0;
                    }).at(-1).videoPrimaryInfoRenderer.videoActions.menuRenderer.topLevelButtons,
                isToggledLike = topLevelButtonsData[0].toggleButtonRenderer.isToggled,
                isToggledDislike = topLevelButtonsData[1].toggleButtonRenderer.isToggled,
                likes = Number(topLevelButtonsData[0].toggleButtonRenderer[isToggledLike ? "toggledText" : "defaultText"].accessibility.accessibilityData.label.match(/^[\d\.\,]+/g)[0].replace(/[\.,]/g,'')),
                rating = data.playerResponse.videoDetails.averageRating,
                // Calculate remaining data
                dislikes = rating != 0 ? Math.round(likes * ((5 - rating) / (rating - 1))) : 0,
                sentimentPercent = (likes / (likes + dislikes)) * 100;

            // Update likes and dislikes buttons count
            var buttonRenderer = document.querySelectorAll(ButonRendererSelector);
            buttonRenderer[0].innerHTML = numberWithCommas(likes);
            buttonRenderer[1].innerHTML = numberWithCommas(dislikes);

            // Update sentiment bar
            document.querySelector("ytd-sentiment-bar-renderer").removeAttribute("hidden");
            document.getElementById("like-bar").setAttribute("style", "width: " + sentimentPercent + "%;");

            // When like/dislike buttons clicked
            const observer = new MutationObserver(function(mutationList, observer) {
                mutationList.forEach(function (mutation) {
                    if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
                        var isToggledLikeLive = buttonRenderer[0].classList.contains('style-default-active'),
                            isToggledDislikeLive = buttonRenderer[1].classList.contains('style-default-active');
                        buttonRenderer[0].innerHTML = numberWithCommas(likes - isToggledLike + isToggledLikeLive);
                        buttonRenderer[1].innerHTML = numberWithCommas(dislikes - isToggledDislike + isToggledDislikeLive);
                    }
                })
            });
            observer.observe(buttonRenderer[0], {attributes: true});
            observer.observe(buttonRenderer[1], {attributes: true});
        } catch (e) {};
    }

    window.addEventListener("DOMContentLoaded", function (event) {
        waitForElm(ButonRendererSelector).then(() => init());
        window.addEventListener('yt-page-data-updated', init, false);
    });
})(window, document);