static File installYouTubeDL() {
  File file = prepareProgramFile(#1006747, isWindows() ? "youtube-dl.exe" : "youtube-dl");
  if (file.exists()) ret file;
  print("Installing youtube-dl");
  S url = isWindows()
    ? "https://yt-dl.org/latest/youtube-dl.exe"
    : "https://yt-dl.org/downloads/latest/youtube-dl";
  saveBinaryFile(file, loadBinaryPage(url));
  if (!isWindows()) makeExecutable(file);
  ret file;
}