Where do you want to put the dvd videos? Onto the computer?
Since they aren’t encrypted, you should be able to simply copy and paste to a folder on the hard drive.
If you want a basic dvd decryption program that would work, you could get DVDDecrypter. It will work with any dvd video that doesn’t have really advanced encryption, and your home movies won’t have any. You can find it at www.mrbass.org It is free to use. DVDShrink is also available there and can rip to the hard drive for you.
Both methods I’ve mentioned require that you have a dvd drive in the computer. If you don’t have one this is going to be much more complicated.