YouTube のお気に入りリストをクリップボードに保存

javascript:
var d = document;
vs = d.getElementsByTagName('ytd-thumbnail');
tx = "";
for (i = 0; i < vs.length-1; i++) {
    v = vs[i].parentNode;
    h3 = v.getElementsByTagName('h3');
    tx += h3[0].textContent.trim() + '\t' + 'https://www.youtube.com/' + v.getAttribute('href') + '\n';
}

var tb = document.createElement("textarea");
tb.setAttribute("type", "hidden");
tb.textContent = tx;
d.body.appendChild(tb);

tb.select();
d.execCommand('copy');
d.body.removeChild(tb);