The process happens pretty quickly. I recommend the free program Freemake Video Converter.
Freemake is pretty easy to use and that's why I recommend it.http://www.freemake.com/free_video_converter/
I will add one precaution. When you’re installing the program there will be several options for additional software that you will probably want to decline installing. You just need to make sure you check the right box. The programs aren't nefarious in nature so if you accidentally install one you can uninstall it without issue.Regards,Joe