i installed many Ubuntu on my PC and i couldn't even listen to a single music file or watch even a small video, it always says plugins not installed. If it can't even those small plugins then whast is the purpose of that whole DVD of Ubuntu...?? And what is the difference between CD and DVD of Ubuntu if it can't even install any plugin from the ??
First, be warned that it might not be legal in some countries, because of software patents.
With that being said, here is how to install it, click here:
Or you can open up a terminal and run the following command:
sudo apt-get install ubuntu-restricted-extras
Select yes, and you'll have ubuntu-restricted-extras installed and working