fix Inappropriate ioctl for device

Example systemd Service.md

@@ -16,9 +16,17 @@ Group=user
 WantedBy=multi-user.target
 ```
 
-Now start the service
+Now start the service:
 ```bash
-chmod +x /home/user/youtubedl-daemon.sh
 sudo systemctl daemon-reload
 sudo systemctl enable --now youtube-dl
 ```
+
+
+
+You can watch the process with:
+
+```bash
+sudo journalctl -b -u youtube-dl.service
+```
+

downloader.py

@@ -229,7 +229,9 @@ while True:
 
         if len(download_queue):  # Don't mess with multiprocessing if all videos are already downloaded
             with Pool(processes=args.threads) as pool:
-                status_bar.set_description_str('=' * os.get_terminal_size()[0])
+                # Doesn't work if not connected to a terminal
+                if sys.stdout.isatty():
+                    status_bar.set_description_str('=' * os.get_terminal_size()[0])  # OSError: [Errno 25] Inappropriate ioctl for device
                 logger.info('Starting downloads...')
                 for result in pool.imap_unordered(download_video,
                                                   ((video, {