You need to 'rip' your DVDs on a Mac or PC and then use iTunes to synch them to your iPad. The iPad has quite specific requirements in terms of the video formats that it will accept. If you Google 'rip DVD iPad' you'll see a whole range of software for your PC that can do this, together with detailed instructions on how to transfer the ripped video files to your iPad. First time around, it can be a bit intimidating, but once you've done it the first time you'll find it easy thereafter.
If you want some specific recommendations for DVD ripping software, don't hesitate to get back in touch with us. Of course, you can also download videos from the iTunes store and, if you're in to educational videos, there are quite a few free ones there too!! iTunes rents videos as well - in HD (high definition) format as well as standard DVD quality. Rental charges are very reasonable and the choice of movies is large...
Tim
Scotland