She can use nero.
download the trial version Nero – Free downloads - latest updates and trial versions
It is best to create a seperate file for her DVDs
then open nero and select the DVD format and then choose to copy disc.
the window will open and show the reading drive and also a destination option. Change the destination option to the new folder and click burn and set back and let it do its work.
Keep in mind that a regular DVD movie will require aproximately 4 to 6 gigs of free space. Some a little more and some a bit less...but 4>6 is a pretty fair average!
Once it is burned to the drive...she can use nero to view it or choose any other DVD player.
NOTE****** there are some videos that just can't be copied due to protective rights management programs. There are ways around this but cannot be discussed in this forum!