How to Download Youtube Video on a Mac (The easiest and absolutely free method)

Youtube-dl, a command line program written in Python, is the ultimate tool to download youtube video on Mac.
The program is easy to use, flexible and robust, and most importantly - it is free.

sudo curl https://yt-dl.org/downloads/2015.04.26/youtube-dl -o /usr/local/bin/youtube-dl
sudo chmod a+x /usr/local/bin/youtube-dl

#check the options
youtube-dl --help

#Just feed the address of the youtube video
youtube-dl https://www.youtube.com/watch?v=JAdF6UfhA40
open .