BBC iPlayer (in-universe)

BBC iPlayer was a website on which one could watch past episodes of a selection of TV series. (TV: The Time of the Doctor, WC: The Zygon Isolation) The website required a TV Licence in order to be used legally. (WC: The Zygon Isolation)

The Eleventh Doctor begged Clara Oswald to learn to use iPlayer after being forced to use his TARDIS to travel back in time every time she missed a television programme. (TV: The Time of the Doctor)

On 10 May 2020, Petronella Osgood and Zygon Osgood watched an episode of Doctor Who called The Zygon Invasion on BBC iPlayer, at the website address, with an account under the name of "Mikey". (WC: The Zygon Isolation)

Osgood had iPlayer bookmarked in her bookmarks bar on Google Chrome. (WC: The Zygon Isolation)

Behind the scenes
The inventor of iPlayer, Ben Lavender, appears in the documentary Interweb of Fear.

"Mikey" in The Zygon Isolation is the account of Michael Williams, the webcast's director and editor.