If you want to copy or burn DVD, the review of the free DVD burning software (http://www.videoconverterfactory.com/tips/free-dvd-burning-software.html) is a good solution.And Freemake is the best one...

Maybe this tool can help you: http://www.videoconverterfactory.com/tips/wv-converter.html
It allows you to convert kinds of files to WAV and other audio formats.

I always play offline videos on my trips and I'm used to download videos with catchvideo:http://www.videoconverterfactory.com/tips/catchvideo-net-download.html
You can have a look at this tip above...

I use HandBrake to convert videos.
http://handbrake.fr/
For batch conversion, this tool can help you, as well： http://www.videoconverterfactory.com/tips/mp4-to-avi.html