This is a python script, that can download videos or entire playlists of videos from YouTube.
To use it, you have to pass the YouTube video link in argv[1] and where you want it downloaded to in argv[2].
Format examples of argv[1] and argv[2]: 'https://www.youtube.com/watch?v=dQw4w9WgXcQ' 'C:\Users'
Jiří Šimeček