1. DV takes about 12 gigabytes per hour.
2. I did not like Capty DVD, but I have heard that some people like it.
3. The actual burning will take about 25 minutes for an hour of video, but encoding takes much longer and depends on the software used and your computer's speed.
4. -r is more compatible with older players, +r is sometimes cheaper. I would buy whatever you get the best deal on.