The RPM Fusion repository is a merger or Dribble, Freshrpms, and rpm.livna.org.
Most of the media handling has software patents that can't be included in the original releases of free versions of Linux like Fedora.
There are also hardware manufacturers like Nvidia that have proprietary software that can't be included in the free releases of Linux.
These repositories may have software with patents that might not be allowed to use where you live.
To install this repository:
#rpm -Uvh download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm
Once it is installed, update your system:
#yum update