turn volume in youtube to "1"

It makes your youtube video volume output at it's maximum as long as you have 100% on.
Fra 29.05.2021. Se den seneste versjonen.
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// ==UserScript==
// @name         turn volume in youtube to "1"
// @namespace    https://greasyfork.org/de/users/777213-tripzz-ѕкιηѕ-lpwsand
// @version      0.4
// @description  It makes your youtube video volume output at it's maximum as long as you have 100% on.
// @author       Genc
// @match        https://www.youtube.com/watch*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function() {
    'use strict';

        setTimeout(function() {
            document.getElementsByClassName("video-stream")[0].volume = 1;
        }, 550);


        function insertAfter(referenceNode, newNode) {
            referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
          };

        var volumeSign = document.getElementsByClassName("ytp-next-button ytp-button")[0];

        var setValue = document.createElement("span");
        setValue.textContent = 1;
        setValue.style.width = "23.354px";
        setValue.style.textAlign = "center";

        insertAfter(volumeSign, setValue);

        setValue.addEventListener("click", function() {
            var svgAnimationSpeaker = document.getElementsByClassName("ytp-svg-fill ytp-svg-volume-animation-speaker")[0];
            if(setValue.textContent == 1) {
                document.getElementsByClassName("video-stream")[0].volume = 0.49831044449650735;
                setValue.textContent = 0.49;
                document.getElementsByClassName("ytp-volume-slider-handle")[0].style.left = "40px";
                svgAnimationSpeaker.setAttribute("d","M8,21 L12,21 L17,26 L17,10 L12,15 L8,15 L8,21 Z M19,14 L19,22 C20.48,21.32 21.5,19.77 21.5,18 C21.5,16.26 20.48,14.74 19,14 ZM19,11.29 C21.89,12.15 24,14.83 24,18 C24,21.17 21.89,23.85 19,24.71 L19,26.77 C23.01,25.86 26,22.28 26,18 C26,13.72 23.01,10.14 19,9.23 L19,11.29 Z")
            } else if (setValue.textContent == 0.49) {
                document.getElementsByClassName("video-stream")[0].volume = 1;
                setValue.textContent = 1;
                document.getElementsByClassName("ytp-volume-slider-handle")[0].style.left = "40px";
                svgAnimationSpeaker.setAttribute("d","M8,21 L12,21 L17,26 L17,10 L12,15 L8,15 L8,21 Z M19,14 L19,22 C20.48,21.32 21.5,19.77 21.5,18 C21.5,16.26 20.48,14.74 19,14 ZM19,11.29 C21.89,12.15 24,14.83 24,18 C24,21.17 21.89,23.85 19,24.71 L19,26.77 C23.01,25.86 26,22.28 26,18 C26,13.72 23.01,10.14 19,9.23 L19,11.29 Z")
            } else {
                setValue.textContent = "Refresh your site.";
            };
        });
})();