During slow times of the year, perhaps no more than twice a month, but during the summer, and during race series, a few times a week. Daily or more often during the Nationals. I am still easing into it. Once a year, I archive it to a CD, then do some trimming. Even in the busiest times, it is at most 10 hours.
Annual average is perhaps an hour.
The hour is plenty, since I keep things simple, and don't have to struggle to change things. There is not a single image map anywhere in the main areas of the site, just plain links. Current media is highly developed to push information, and can't be beat for speed, simplicity, accessibility and flexibility. People enjoy having information pushed at them - that will not change. Web video ain't so hot either.