Either drag-and-drop an URL from a web browser or use the built-in search:
This is (not) the greatest stuff in the world. This is just a tribute.
Sometimes it is needed to visit pytube issues list and apply fixes, for example
As of 5/25/23:
pip3 install --force-reinstall https://github.com/garywu007/pytube/archive/refs/heads/master.zip
For Fedora:
sudo dnf install qt5-qtquickcontrols2-devel
sudo dnf install qt5-qtbase-private-devel
sudo dnf install qt5-linguist