Latest version (v1.2) displays download progress. If you need help setting up Python, refer to my Python set up script in the Ubuntu set up repo.
Download "onion-extract" into your desired folder (e.g. "onion-extract"). Set up Python virtual environment (e.g. env).
python3 -m venv env
Activate virtual enviornment.
source env/bin/activate
Install required modules.
pip3 install -r requirements.txt
Sample "onion-extract" command.
python3 onion-extract.py -o [download folder name] [onion url]