Plex (streaming service)

An application was installed on Petronella Osgood's computer by 10 May 2020. Its logo was a black circle with an orange border and an orange arrow in its centre, pointing right. (WC: The Zygon Isolation)

Behind the scenes
While the application was not named in WC: The Zygon Isolation, the application was named "Plex" in the real world, and was an American streaming media service and a client–server media player platform created by Plex, Inc..