VLC is a free and open source cross-platform multimedia player for Windows, Linux, Mac OS X and Unix.
To install VLC Media player on Ubuntu 12.04
1.Open Terminal.To open terminal click the Dash home from unity launcher.And type terminal in the search field. And click Terminal.
2.Type the below code in terminal and hit enter.
sudo add-apt-repository ppa:n-muench/vlc
3.Type your ubuntu password if needed.
4.Then press enter to continue or ctrl-c to cancel adding the ppa.
5.Type below command and hit enter
sudo apt-get update
6.Then type below command and press enter
sudo apt-get install vlc
Type y and hit enter to confirm vlc installation.
After the successful installation,click the Dash home from unity launcher.And type vlc in the search field.