Disable HTML5 Video Autoplay

Stops HTML5 video autoplay on most websites, even after dynamic page changes
换行
// ==UserScript==
// @name         Disable HTML5 Video Autoplay
// @namespace    RGlzYWJsZSBIVE1MNSBWaWRlbyBBdXRvcGxheQ
// @version      1.2
// @description  Stops HTML5 video autoplay on most websites, even after dynamic page changes
// @author       smed79
// @license      GPLv3
// @icon         https://i25.servimg.com/u/f25/11/94/21/24/noplay10.png
// @homepage     https://gf.qytechs.cn/en/scripts/543737-disable-html5-video-autoplay
// @include      http://*
// @include      https://*
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    let observer;

    const pauseVideoOnce = () => {
        const video = document.querySelector('video');
        if (video && !video.paused && video.currentTime < 2) {
            video.pause();
            if (observer) observer.disconnect();
        }
    };

    const waitForVideo = () => {
        if (observer) observer.disconnect();
        observer = new MutationObserver(() => {
            pauseVideoOnce();
        });
        observer.observe(document.body, { childList: true, subtree: true });
    };

    const hookNavigation = () => {
        let lastUrl = location.href;
        const navObserver = new MutationObserver(() => {
            const currentUrl = location.href;
            if (currentUrl !== lastUrl) {
                lastUrl = currentUrl;
                setTimeout(waitForVideo, 500);
            }
        });
        navObserver.observe(document.body, { childList: true, subtree: true });
    };

    waitForVideo();
    hookNavigation();
    window.addEventListener('yt-navigate-finish', () => {
        setTimeout(waitForVideo, 500);
    });
})();
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