Playception

Playception: Each actor must portray a character playing another character.

Source: wiktionary

"[title of show]" tells the story about two guys writing a play about two guys who are writing a play. You get a play-ception sort of feel watching this performance.

Source: wiktionary

“It's playception,” junior Isabel Leiva described, explaining the premise of the play. With an endless list of costumes, props, and characters, and a play-within-a-play, the complexity of the show has proven to be a big challenge for the cast and crew.

Source: wiktionary