You can download as normal avi then convert them to mp4 or just look for mp4. If you go download.com you can get loads of free avi converters. I use Freemake video converter, it's better than any I have bought by far, it even converts music file I.e. flac files.
Hope this helps, if you need any further advice on where to get your DVDs let me know and I will send you the info.
John