Video Conferencing Video conferencing allows people to see each other over the Internet. They can also speak to each other but talking uses up a lot of the bandwidth* available on the telephone line so people normally communicate by typing messages via the keyboard. *Bandwidth is the capacity of a cable to carry data. The best way to understand the term 'bandwidth' is to compare it with a water pipe - a large pipe capable of carrying a lot of water could be said to have a high bandwidth.