Although both services are based on the transmission of audio and video, they differ in the direction and scope of the audience. Designed for one-way communication, from a small number of speakers or speakers to large groups of viewers, the video broadcasting service (videocast) allows video broadcasting of events such as seminars, conferences or sporting events. Videoconferencing services (COLIBRI) are geared to the two-way communication of a limited number of participants, where everyone has equivalent levels of participation and can participate and "confer" whenever necessary.