Check you python version

$ python3 --version

> Python 3.11.12

Python 3.11.12 - this is a dev version

Create venv and

python3 -m venv ~/.virtualenvs/ydownload

activate and install requirements

source ~/.virtualenvs/ydownload/bin/activate
pip install -r requirements.txt

To load file just run

python app.py https://www.youtube.com/watch?v=dQw4w9WgXcQ

Add this alias to your ~/.zshrc or ~/.bashrc or similar...

alias yd='~/.virtualenvs/ydownload/bin/python3 <PATH TO FILE>/app.py'