!7

p {
  S url = "https://www.youtube.com/watch?v=VCbTnSknDyQ";
  File outputFile = prepareProgramFile("youtube-dl.out");
  S outputTemplate = f2s(new File(programDir(), "%(title)s-%(id)s.%(ext)s"));
  tailFile(outputFile, 1000, voidfunc(S s) { printNoNewLine(fixNewLines(s)) });
  // make a dependent child process that is exited when we exit
  backtickToFile_dependent(print("youtube-dl -o " + bashQuote(outputTemplate) + " " + bashQuote(url)), outputFile);
}