// ==UserScript==
// @name        Hide HDR support from YouTube
// @author      Jefferson "jscher2000" Scher
// @namespace   JeffersonScher
// @version     0.1
// @copyright   Copyright 2019 Jefferson Scher
// @license     BSD-3-Clause
// @description Hide HDR support for Firefox 69. v0.1 2019-10-10
// @match       https://www.youtube.com/*
// @match       https://www.youtube-nocookie.com/*
// @match       https://www.youtu.be/*
// @run-at      document-start
// @grant       none
// ==/UserScript==
var mse = window.MediaSource;
if (mse){
// Set up replacement for MediaSource type support function
var nativeITS = mse.isTyp###pported.bind(mse);
mse.isTyp###pported = ourITS(nativeITS);
}
// Here's the replacement
function ourITS(fallback){
// type is a string (hopefully!) sent by the page
return function (type) {
if (type === undefined) return '';
//console.log('testing for: '+ type);
// Don't support HDR (current as of 10/10/2019)
if (type.toLowerCase().indexOf('eotf=bt709') > -1 ||
type.toLowerCase().indexOf('eotf=catavision') > -1) return '';
// Uncomment to block all VP9 (if performance is bad)
//if (type.toLowerCase().indexOf('vp9') > -1) return '';
// Let Firefox handle everything else
return fallback(type);
};
}