Ubuntu 10.x playing ALL DVD videos: via a simple GUI app, precise instructions required for every day folk, please

Question

Is there a DVD player application i.e. a graphical user interface for Ubuntu that plays ALL DVD Videos, encrypted, non-encrypted, home made DVDs, "CSS" DVDs?

Is it easy and straight forward to install and guaranteed to work?

(Obviously looked at VLC Player (won't play a commercial DVD I've got - does nothing, no error message), Movie Player (error message something like can't open/can't play). I've also looked at Xine, libCSS, MPlayer and the indication of how success they might work for all DVDs in their documentation seems vague, or the Synaptic package manager doesn't download everything, or there is a command line instruction which works for older versions of Ubuntu and/or it reports something missing, directory not found, or possibly assumes you've done something else beforehand.)

Answer 1

I'm going to answer my question - the answer at the moment appears to be: NO - there isn't a guaranteed method to play all DVD-Videos in Ubuntu.

The City of God Region 2 DVD-Video of the film I have won't play, frozen screen, covered in green macroblocks, in Ubuntu.

BUT on the exact same PC and drive booted into Windows 7, it plays perfectly on VLC.

Credit to @dev for their answer - their answer is the official answer it seems for Ubuntu - as they reference. However this answer only applies to some DVD-Videos as it does work for some other films I have bur not the one above. On that basis, the answer cannot be the accepted answer, the I have upvoted @devs answer.

I've opened a thread on the Official Ubuntu forums to specifically track my issue: http://ubuntuforums.org/showthread.php?p=10179508

Answer 2

Have you installed libdvdcss2? This page should help you out: https://help.ubuntu.com/community/RestrictedFormats/PlayingDVDs

Just to Clarify, you just need to use these two commands:

sudo apt-get install libdvdread4

and then:

sudo /usr/share/doc/libdvdread4/install-css.sh

After this, I usually use VLC to play the DVD, since IMHO, it's the best Media player out there.