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YouTube /embed/ forwarder

Forwards YouTube links to the youtube.com/embed/* page, so there's just the video in your window and nothing else.

// ==UserScript==
// @name        YouTube /embed/ forwarder
// @description Forwards YouTube links to the youtube.com/embed/* page, so there's just the video in your window and nothing else.
// @namespace   https://greasyfork.org/en/users/1148791-vuccala
// @author      Vuccala
// @icon        https://archive.org/download/yt_icon/yt.png
// @match       *://*.youtube.com/*
// @match       *://*.youtu.be/*
// @run-at      document-start
// @version     0.5
// @grant       none
// @license     MIT

// ==/UserScript==
(function () {
    const embedBaseUrl = 'https://www.youtube.com/embed/';

    function getId(u) {
        const idMatch = /(?:[?&]v=|\/(?:embed\/|v\/|shorts\/))([^&?/]+)/.exec(u);
        return idMatch ? idMatch[1] : '';
    }

  function createSpoofPage(embedUrl) {
    const html = `
        <html style="background-color: #000;">
            <head>
                <meta http-equiv="refresh" content="0; url='${embedUrl}'" />
                <meta name="referrer" content="origin" />
            </head>
            <body style="background-color: #000; color: #aaa;">
                <p>Redirecting to YouTube embed...</p>
            </body>
        </html>
    `;
    const blob = new Blob([html], { type: 'text/html' });
    return URL.createObjectURL(blob);
}

    const url = window.location.href;

    if (url.includes('/watch?v=') || url.includes('/shorts/') || url.includes('/watch?app=desktop&v=')) {
        const videoId = getId(url);
        const embedUrl = embedBaseUrl + videoId;

        if (embedUrl !== url) {
            const spoofPage = createSpoofPage(embedUrl);
            window.location.href = spoofPage;
        }
    }
})();