How to install youtube-dl in Ubuntu 14?

Just execute the following command to install youtube-dl executable

root@hostname:~# pip install youtube-dl

To verify if youtube-dl installation successful.

root@hostname:~# youtube-dl --version

2016.06.03

To upgrade youtube-dl to new version.
root@hostname:~# pip install --upgrade youtube-dl
Requirement already up-to-date: youtube-dl in /usr/local/lib/python2.7/dist-packages
Cleaning up...