because my younger brother is always asking how to do this: instructions Open the Terminal app Copy and paste the following into Terminal: ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" Hit Enter Copy and paste the following into Terminal: brew install varenc/ffmpeg/ffmpeg --with-openjpeg --with-rubberband --with-tesseract Hit Enter Copy and paste the following into Terminal: brew install youtube-dl Hit Enter Copy a YouTube URL of your liking: https://www.youtube.com/watch?v=oHg5SJYRHA0 Type the following into Terminal: youtube-dl then paste the URL The command should look like the following: youtube-dl https://www.youtube.com/watch?v=oHg5SJYRHA0 Hit Enter Type open . and find your video to enoy!