as you might know fedora will NEVER ship with patent( non-gpl)/copyright encumbered software
as such "out of the box" fedora will NEVER have support for video dvd's ( libdvdcss )
-- it is in ATrpms repo ---
however VLC AND libdvdcss ( needs to be installed separately ) will play "store bought" dvd's
RPM-Fusion has vlc
at the very top of the fedora forum IN Yellow
is a link to some guides
and a VERY VERY GOOD GUIDE !!
--- for the soon to be dead fedora 16
see the "media players
--- NOTE ---
Fedora 16 is about to hit it's End Of Life !!!
it is strongly recommended
you do a new clean install of fedora 18. As SOON as possible .