This is a command line tool for downloading youtube videos.
Use the following linux command for downloading videos:
smarttips@71:~$ youtube-dl https://www.youtube.com/watch?v=MR8afJE98Y8
For install this package use the commands in terminal
smarttips@71:~$ sudo add-apt-repository ppa:nilarimogard/webupd8
smarttips@71:~$ sudo apt-get update
smarttips@71:~$ sudo apt-get install youtube-dl
Now you are ready to do downloading…..Enjoy!!!!