Shell is where gurus work, zsh is a modern shell and Oh My zsh is a way to manage your zsh themes and plugins. But this video is not about "do this and every will be more beautiful". This video is about "Make it beautiful and learn new things". Lets try the gateway drug of Oh My Zsh. My suggestions after you saw this: create a new user on your machine, change its shell to zsh, install ohmyzsh. Play around, if you liked it, re-do for your own user ;) You can find the "oh my zsh" here: https://ohmyz.sh/