These are my notes for installing VLC on Fedora 20, using only rpmfusion free:

gpg --keyserver pgp.mit.edu --recv-keys AE688223 B5F29883
yum localinstall http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm
gpg --fingerprint AE688223 B5F29883
yum install -y vlc mozilla-vlc

The RPM Fusion Keys were as follows during my installation:

pub   4096R/AE688223 2013-01-01
  Key fingerprint = 0017 DDFE FD13 2929 9D55  B1D3 963A 8848 AE68 8223
uid                  RPM Fusion free repository for Fedora (20) <rpmfusion-buildsys@lists.rpmfusion.org>

pub   4096R/B5F29883 2013-01-01
  Key fingerprint = A84D CF58 46CB 10B6 5C47  6C35 63C0 DE8C B5F2 9883
uid                  RPM Fusion nonfree repository for Fedora (20) <rpmfusion-buildsys@lists.rpmfusion.org>

If you want to install libdvdcss, you need to add another repo and then install it:

yum localinstall http://dl.atrpms.net/f20-x86_64/atrpms/stable/atrpms-repo-20-7.fc20.x86_64.rpm
yum install libdvdcss

This is the fingerprint I observed:

Importing GPG key 0x66534C2B:
 Userid : "ATrpms.net (rpm signing key) <Axel.Thimm@ATrpms.net>"
 Fingerprint: 7d6a 4524 1d82 5ec2 fde5 9651 508c e5e6 6653 4c2b  
 Package : atrpms-repo-20-7.fc20.x86_64 (@/atrpms-repo-20-7.fc20.x86_64)
 From : /etc/pki/rpm-gpg/RPM-GPG-KEY-atrpms