how to download youtube video from source code?
['Download VLC, or another open-source media player.', 'Open VLC and click "Open Media"', 'Click "Network" and paste YouTube URL.', 'If using Mac, select "Window" and then "Media Information"', 'If using Windows, select "Tools" and then "Codec Information"', 'Find the "Location" bar at the bottom and copy that URL.']