By default, Ubuntu doesn’t have full multimedia support. Because of patents and copyrights that apply in some countries.
Instruction is simple:
1. Open a terminal ( Ctrl + Alt + T )
2. Paste the following code:
sudo apt-get install ubuntu-restricted-extras
3. Enter password
or press the button below
Alternatively you can use VLC Media Player which can play most of the audio/video formats:
sudo apt-get install vlc
or via Software Center
