Googling for and installing a package from a random website is a last resort for Linux/GNU and it's not a great idea recommending it to someone who's new to Linux. It may be what you do with Windows but it's best to stick with the repositories on Linux as it makes it far easier to update and manage software and helps to keep malicious software out among other things. To enable DVD playback support for Ubuntu, should you choose to use that distro, have a look at this guide: https://help.ubuntu.com/community/RestrictedFormats/