Zoom

The Zygon and human versions of Petronella Osgood once called each other on Zoom. (WC: The Zygon Isolation)

Jo Jones was preparing to receive a demonstration of the twins' hip-hop music over Zoom, but they were interrupted when Clifford Jones brought an Auton daffodil in their home. (WC: Return of the Autons)

Behind the scenes

 * Zoom is a real website used for video calls.