How to save DVD files onto my computer then transfer them to iTunes?

I recently got Green Day's 'Bullet in a Bible' and 'Awesome as ***' DVD's, as well as All Time Low's 'Straight to DVD.' I have the physical copies, and want to transfer them onto my computer then onto iTunes so that I could have them on my iPhone. How do I do that? Whenever I put in my DVD's into the computer, the autoplay thingy comes up and gives me the options of either using Windows Media Player or Realplayer. I can't figure out how to do it.

Put the disk in your computer, open the folder to view the file on the disk, make the window half the size of your screen, right click while dragging the folder to your desktop(wherever you want it, it doesn't matter whatsoever)[repeat for other files], click copy(may vary on what it says depending on the computer you have, will have copy though), close the files window, open iTunes, make it half the size of your screen, and drag the file(s) into iTunes(you MAY have to right click while dragging the file[s] and click copy{or whatever depending on your computer}).