Copy Meta about current YT Video

ytCopyMeta.js

// ==UserScript==
// @name         YT Copy Meta
// @namespace    https://github.com/Maartyl
// @version      0.1
// @description  Copy Meta about current Video
// @author       Maartyl
// @match        https://www.youtube.com/watch*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant        GM_setClipboard
// @run-at       context-menu
// ==/UserScript==

(function() {
    'use strict';

    function gattr(qry, attr){
        attr = (attr==null)?'content':attr;
        return document.querySelector(qry).getAttribute(attr);
    }
    function mp(name, attr){
        return gattr("meta[property='"+name+"']", attr);
    }

    function grab(){
        let title = mp("og:title");
        let url = mp("og:url");
        let image = mp("og:image");
        let kwds = gattr("meta[name=keywords]");
        let chUrl = gattr("#channel-name [href]", "href");
        let chName = document.querySelector("#channel-name [href]").innerText;

        // assumes RMB on comment-time-ref
        let cmnt = document.activeElement.href

        let built = cmnt == null ? "" : "[[YT cmnt]]";
        if (cmnt){
            built += "\nytCmnt:: " + cmnt;
        }
        built += "\nytUrl:: " + url;
        built += "\nytTitle:: " + title;
        built += "\nchName:: " + chName;
        built += "\nchUrl:: " + chUrl;
        built += "\n![thumbnail]("+image+")";
        built += "\nytKeywords:: " + kwds;
        built += "\n";

        GM_setClipboard(built);
    }

    grab();

})();