I'm looking for a hypernym to replace "movies and plays" in "Some movies and plays ...". I think that there's a word that describes both but I just can't remember it.
I suggest aiming a bit more narrowly than Jezebelisgone's suggestion of show or performance and using the two-word term scripted performance, where scripted refers to the following sense of script (as defined in Merriam-Webster's Eleventh Collegiate Dictionary ):
the written text of a stage play, screenplay, or broadcast; specif : one used in production or performance
As the terms stage play and screenplay suggest, films and plays have in common that the performers generally work from a carefully developed script of speeches that the actors memorize and recite in character. Many types of shows and performances (dance recitals, juggling acts, etc.) do not do this. Nevertheless, scripted performance does not apply exclusively to films and stage plays. TV shows, radio broadcasts, comedy routines, and even political speeches (for example) could be categorized as scripted performances as well.
shows, films, television, or other performances or activities that entertain people, or a performance of this type
Attribution: (Definition of “entertainment” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)