|The main difference you'd be concerned about is capacity. A cd can hold about 700 meg of data or 80 minutes as an audio cd. A DVD and hold at least 4.7 gig (4700 meg) and newer types can hold up to 17 gig:|
If you have a DVD burner you need to know which disks it's capable of recording on.
Of course a cd burner can only record CD's while DVD burners can usually record either. Burner software that can record DVD's will usually record CD's also.
All the burner software I've seen will 'tell you when it's done'.
To make an audio cd your burner software has to know that's what you want to do otherwise the result is just a data disk that has audio files on it and it won't play in a cd player, although the files will open and play using player software like WMP or Winamp. I'm sure the same is true for movie DVD's but I've never had occasion to do that.
As data disks you can put any files you want on either cd's or dvd's, as long as they fit. So you can put video files on a cd as data files and they will play when using software that recognizes their file type.
There are record-once cd's and dvd's (cd-r and dvd-r) and cd's and dvd's that can be erased, formatted and recorded on again (cd-r/w and dvd-r/w). Most people prefer the record-once type because sometimes r/w disks get fussy about what drives they'll work in.