Video conferencing allows for interactive learning at a distance through demonstrations and guest lecturers. It has several key characteristics that support learning, including allowing global collaboration, continuous interactivity, and virtual field trips. The tools needed for video conferencing include hardware like computers, cameras, microphones, speakers and codecs, as well as software applications like Skype, ooVoo, Adobe Connect, AT&T Connect and MegaMeeting. These applications vary in features and cost, making video conferencing a flexible and affordable option to enhance learning environments.