YouTubeのショートやクリップの動画を開く 修正

javascript: (function () {
    var code = "";
    var mt = /https:\/\/www\.youtube\.com\/shorts\/(.+)/i.exec(location.href);
    if (mt != null) {
        code = mt[1];
    }
    else{
        var m = document.querySelector("meta[itemprop='videoId'], meta[itemprop='identifier']");
        if (m != null) {
            code = m.getAttribute("content");
        }
    }
    if (code != "") {
        var url = "https://www.youtube.com/watch?v=" + code;
        location.href = url;
    }
    else {
        alert("Invalid page!");
    }
    return;
}
)();