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YouTube.com quality change buttons (Mobile / Desktop)

Adds quality change buttons below the video (144p, 240p, 360p, 480p, 720p, 1080p...) works on mobile (m.youtube.com) and on desktop.

Skript installieren?
Vom Ersteller vorgeschlagenes Skript

Ihnen könnte auch YouTube.com more playback speeds (Mobile / Desktop) gefallen.

Skript installieren 
// ==UserScript==
// @name         YouTube.com quality change buttons (Mobile / Desktop)
// @namespace    m-youtube-com-quality-change-buttons
// @version      1.13
// @description  Adds quality change buttons below the video (144p, 240p, 360p, 480p, 720p, 1080p...) works on mobile (m.youtube.com) and on desktop.
// @author       hlorand.hu
// @match        https://m.youtube.com/watch*
// @match        https://youtube.com/watch*
// @match        https://*.youtube.com/watch*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=tampermonkey.net
// @grant        none
// @license      https://creativecommons.org/licenses/by-nc-sa/4.0/
// @run-at       document-idle
// ==/UserScript==

// Screenshot: https://ibb.co/pyXQd4C

(function() {
    //'use strict';

    function addbuttons(){
        document.getElementById("qualitybuttons").innerHTML = "";

        var player = document.getElementById('movie_player');

        // it is neccesary to start the video, to getAvailableQualityData
        if( document.location.href.includes("m.youtube.com") ){
           player.click(); // start video
           player.click(); // pause video
        }

        const qualities = player.getAvailableQualityData();

        qualities.forEach((q)=>{

            let button = document.createElement('button');
            button.setAttribute("quality", q.quality);
            button.textContent = q.qualityLabel.replace("p50","p").replace("p60","p"); // remove fps from label
            button.className = "qualitybutton";

            button.style.margin = "4px";
            button.style.padding = "4px";
            button.style.position = "relative";

            // get current quality
            if( player.getPlaybackQualityLabel() == q.qualityLabel ){
                button.style.backgroundColor = "darkorange";
            } else{
                button.style.backgroundColor = "green";
            }

            button.onclick = function() {
                player.setPlaybackQualityRange( this.getAttribute("quality") );

                // highlight the clicked button and desaturate the others
                document.querySelectorAll(".qualitybutton").forEach((btn)=>{
                    btn.style.backgroundColor = "green";
                });
                this.style.backgroundColor = "darkorange";
            };

            let target = document.getElementById('qualitybuttons');
            target.insertBefore(button, target.firstChild);

        }); // end qualities foreach

    } // end addbuttons


        // Periodically check if the buttons are visible (sometimes YouTube redraws its interface).
        setInterval(()=>{

            // Creating a div that will contain buttons.
            if( document.getElementById("qualitybuttons") == undefined ){

                // placement of buttons on desktop
                let parent = document.getElementById('above-the-fold');

                // placement of buttons on tablet
                if( !parent ){
                    parent = document.querySelector('.watch-below-the-player');
                }

                // placement of buttons on mobile
                if( !parent ){
                    parent = document.querySelector('.related-chips-slot-wrapper');
                }

                let wrapper = document.createElement('div');
                wrapper.setAttribute("id","qualitybuttons");
                parent.insertBefore(wrapper, parent.firstChild);
                addbuttons();

            }

            // Sometimes the buttons are not added, so I check and add them if necessary.
            if( document.getElementById("qualitybuttons").textContent.trim() === '' ){
                addbuttons();
            }
        }, 1000);

})();