Thanks Rob but that was NOT what I was asking about!
I was asking about the ability to burn say 20 minutes of video onto a REGULAR CD-R disc. I thought I made that very clear, but oh well!
There are software packages out there that offer to do this.
Example: DVD-COPY 3.0http://www.321studio.com/
Presumably they do this by writing a short amount of VCD type data to a regular CD-R.