What is the difference between DVD and VCD?

DVD content is recorded using MPEG2 compression and allows up to 2 hours of high quality video to be recorded on one DVD-R disk. Note that it is possible to record 4 or even 6 hours of video to a DVD disk but it will be subject to loss of quality and we do not recommend these modes of recording.
VCD content on the other hand uses MPEG1 compression and is only able to hold around 1 hour of video on one CD-R disk and does not produce as good a quality as DVD.