Sometimes you need to get your team or group together for a meeting, but it is just impossible for everyone to get together in the same place at the same time. Because it is important to have everyone seeing the same thing at the same time, a teleconference just does not seem like the best vehicle for interaction. What do you do?
Well, pretty much, you have two choices: web conferencing or video conferencing. How do you know which one would be best? It can be confusing. There is overlap in capability because web conferencing can include video and you can share documents via video conferencing.
To decide, which one is best for you and your meeting, you have to ask two things: "What do I, and everyone else, need to see?" and "What is being emphasized, the content of a presentation or interactions between people?"
If the answer is "the presentation and its content", then you should be thinking "web conference". If you want, you could arrange a small pop-up window on the screen with a video of the speaker just to add a personal touch. If the answer is "personal interaction", then video conferencing is your communications vehicle of choice.
Web conferences are very good if you are making product demonstrations, analyzing reports/data or doing software training. Video conferences are better for board meetings, negotiations, interviews, or depositions.
Of the two, because video conferencing requires more technology and infrastructure, it is the more expensive option.