Youtube Speed Up

Youtube Speed at 10x

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Youtube Speed Up
// @namespace    http://tampermonkey.net/
// @version      0.1.4
// @description  Youtube Speed at 10x
// @author       me
// @match        https://www.youtube.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var that = this;
    var thatArguments = arguments;
    //https://stackoverflow.com/a/52809105----
    history.pushState=(function(f){
        return function pushState(){
            var ret = f.apply(that, thatArguments);
            window.dispatchEvent(new Event('pushstate'));
            window.dispatchEvent(new Event('locationchange'));
            return ret;
        }
    })(history.pushState);

    history.replaceState = (function (f){
        return function replaceState(){
            var ret = f.apply(that, thatArguments);
            window.dispatchEvent(new Event('replacestate'));
            window.dispatchEvent(new Event('locationchange'));
            return ret;
        }
    })(history.replaceState);

    window.addEventListener('popstate',function(){
        window.dispatchEvent(new Event('locationchange'))
    });

    //https://stackoverflow.com/a/45956628----
    //youtube wtf events
    //new layout > 2017
    window.addEventListener("yt-navigate-finish", function(event) {
        window.dispatchEvent(new Event('locationchange'))
    });

    //old layout < 2017
    window.addEventListener("spfdone", function(e) {
        window.dispatchEvent(new Event('locationchange'))
    });

    function updateAvailablePlaybackRates() {
        var path = '';
        if(typeof _yt_player === "undefined"){
            console.log("Something goes wrong with _yt_player variable");
            return;
        }
        
        //Thanks to him: https://stackoverflow.com/a/48051090
        function findAvailablePlaybackRates(objectToSave,prep) {

            var count=0;
            for(var i in objectToSave){
                //Little Fix because they could be null
                if(Object.keys(objectToSave)[count] && objectToSave[Object.keys(objectToSave)[count]]){
                    //function to be injected
                    if(Object.keys(objectToSave)[count] == "getAvailablePlaybackRates"){
                        //save the path
                        path = (prep===""?"":prep+".")+Object.keys(objectToSave)[count];
                    } else if(objectToSave[Object.keys(objectToSave)[count]]?.prototype?.getAvailablePlaybackRates !== undefined){
                        //In december 2025 youtube changed something, now it works again with this fix
                        path = (prep===""?"":prep+".")+Object.keys(objectToSave)[count]+".prototype.getAvailablePlaybackRates";
                    }
                    //we can stop here!!
                    if(path !== '') return;
    
                    //Useless for this purpose
                    //if(objectToSave[i].constructor.name == "Object" || objectToSave[i].constructor.name == "Array")
                    //    findAvailablePlaybackRates(objectToSave[i],prep);
    
                    var objOfObj = objectToSave[Object.keys(objectToSave)[count]];
    
                    //getAvailablePlaybackRates is hidden somewhere do deeper!!
                    if( typeof objOfObj !== "undefined" && objectToSave[i].constructor.name == "Function" &&
                       Object.keys(objOfObj).length !== 0 ){
                        var incount = 0;
                        for(var j in objOfObj){
                            //I don't know but ok JS!
                            if(typeof objOfObj !== "undefined"){
                                findAvailablePlaybackRates(objOfObj[j],(prep===""?"":prep+".")+Object.keys(objectToSave)[count]+"."+Object.keys(objOfObj)[incount]);
                            }
                            //we can stop here!!
                            if(path !== '') return;
                            incount++;
                        }
                    }
                }
                count++;
            }
        }

        findAvailablePlaybackRates(_yt_player,"");
        console.log("Path detected at _yt_player."+path);

        //recursion to inject a new function!!
        function setAvailablePlaybackRates(path,index,splitted) {
            if(splitted.length - 1 == index){
                //over 8x it's muted!!!!!
                path[splitted[index]] = function(){return [0.25,0.5,.75,1,1.25,1.5,1.75,2,2.25,2.5,2.75,3,3.25,3.5,3.75,4,5,6,7,8,9,10]};
                //[0.25,0.5,.75,1,1.25,1.5,1.75,2,2.25,2.5,2.75,3,3.25,3.5,3.75,4,4.25,4.5,4.75,5,5.25,5.5,5.75,6,6.25,6.5,6.75,7,7.5,8,8.5,9,9.5,10]};
            }else setAvailablePlaybackRates(path[splitted[index]],index+1,splitted);
        }

        setAvailablePlaybackRates(_yt_player,0,path.split('.'));
    }


     function runUpdateAvailablePlaybackRates() {
        if(typeof _yt_player === "undefined"){
            var interval = setInterval(function(){
                if(typeof _yt_player !== "undefined"){
                    clearInterval(interval);
                    updateAvailablePlaybackRates();
                }
            },5);
        }else{
            updateAvailablePlaybackRates();
        }
    }

    function run(){
        runUpdateAvailablePlaybackRates();
    }

    window.addEventListener('locationchange', run);

    run();
})();