Hope I'm not showing my ass here but from my experience there's not as much hassle and time and money needed for getting video to people as it might seem like. I think the people who sell this sort of software want you to think there's more to it so they can convince you to buy their product.
As far as I know, you can get just about anything done with non-live video using the various free tools out there, or the less expensive ones. You record, edit and add any effects or spliced ads or whatever. If you don't expect a lot of viewers or have a ton of bandwitch, you can use windows media encoder / movie maker to stream live.
re: Adjusting 'lighting'... are we talking physical lighting (nothing to do with the software) or brightness and contrast stuff? That can be adjusted with fairly inexpensive software, esp. if it doesn't have to be done on the fly/live.
I would take jcin's word over mine tho
Tom: I would just save the video in a digital format on the camera, transfer to the computer, and do the conversion to make DVD's. Then from the same source convert it to a decently compressed format such as h264/flv. You can then stick that video on a website and people can view it through an embedded flv player like the ones youtube uses. It's not quite the same as live but it's nice because you can't miss any part of it, and seeing stuff a few hours or a few days after is still great. And there are none of the headaches that I'm sure jcin's gotten pretty familiar with.