You can't just copy-and-paste files from a DVD for it to work, you must actually use an application to rip it to your hard drive as an MPEG, AVI, etc file. However, keep in mind that if it's a commercial DVD you're likely not permitted to distribute copies, including to your MIL, due to copyright laws. In addition, a ripped DVD can take up to 4.7GB, whereas most e-mail attachments are limited to 10MB or less, so e-mailing is usually not an option for video.
Video currently opens w/ my Windows XP OS, Power DVD or Windows Media Player. However, when exploring CD files nothing stands out for me to email this to my MIL in NV. Any assistance is greatly appreciated.