[peterwwillis]

Do you have Docker? Then you can use an open source web UI rather than run the command-line tool.

  cat > youtube-dl-webui.Dockerfile <<EOF
  FROM d0u9/youtube-dl-webui
  RUN pip3 install --upgrade youtube_dl
  EOF
  
  cat > conf.json <<EOCONF
  { "general": {"download_dir": "/tmp/ytdui/download","db_path": "/tmp/ytdui/webui.db","log_size": 10},
    "server": {"host": "0.0.0.0","port": 5000} }
  EOCONF
  
  docker build \
        -f youtube-dl-webui.Dockerfile \
        -t youtube-dl-webui:latest \
        .
  
  mkdir ytdui && chmod 777 ytdui
  docker run \
        --rm -it \
        --name youtube_dl_webui \
        -p 5000:5000 \
        -e FLASK_DEBUG=1 \
        -e CONF_FILE=/conf.json \
        -v `pwd`/conf.json:/conf.json \
        -v `pwd`/ytdui:/tmp/ytdui \
        youtube-dl-webui:latest
  
  firefox http://localhost:5000/

That's the simplest one to get running I think (https://github.com/d0u9/youtube-dl-webui). Another is in PHP (https://github.com/timendum/Youtube-dl-WebUI).