With this you can download songs in mp3 or mp4 format from terminal by just telling small part of lyrics to it.
Requirements - pip3 installed. Python 3.4.1+
Installation Process- Create folder youtubeDownloader in your home directory. Clone the repository in that folder. Run setup.sh file from scripts folder. It will setup virtualenv and install dependencies. Copy downloadSong.sh file from scripts folder and paste it to home dircetor. Now to use it just run downloaSong.sh.