The Free On-line Dictionary of Computing (30 December 2018):

video conferencing

    A discussion between two or more groups of
   people who are in different places but can see and hear each
   other using electronic communications.  Pictures and sound are
   carried by the telecommunication network and such conferences
   can take place across the world.

   To overcome the bandwidth and latency limitations of
   current networks (especially the PSTN), some form of video
   compression is often used.

   (1995-05-01)