ViolentMonkey script to force original quality on Douyin (Chinese TikTok) without being logged in

streamqualityoverride.js

// ==UserScript==
// @name         Stream Quality Override
// @namespace    Douyin
// @version      1.0
// @description  Maintains high quality stream URLs
// @match        https://live.douyin.com/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    const originalFetch = window.fetch;

    window.fetch = async (...args) => {
        if (args[0].includes('stream-')) {
          console.log("Forcing origin quality")

          const streamQuality = JSON.parse(__pace_f[7][1])
          console.log(streamQuality)
          const origin = streamQuality.data.origin.main.flv.replace("http:", "https:")
          console.log(origin)

          args[0] = origin
        }

        const response = await originalFetch(...args);
        return response;
    };
})();