EPK stands for Electronic Press Kit, which I am defining as "recorded cast and crew interviews and other clips that capture the making of the movie to be used for publicity." Is that right? Next, what is its origin? Does anyone know how far it goes back? Any early examples would be awesome.
According to a Google Books Search, it dates at least as far back as 1982:
If home-video technologies threaten to put movie theaters out of business, you wouldn't know it from the Hollywood studios' latest promotional gimmick: the electronic press kit, a videotaped collection of film clips and interviews with the stars, producers, and directors of a new film.
Channels of Communications, November/December issue, 1982
Given the wording of the article, it probably doesn't date back much further than that.
According to Oxford English Dictionary, press kit dates to 1954.
The publicity staff entered with tons of mimeograph paper,..press kits, a Western Union man and boxes of pencils.
- 1954 Statesville (N. Carolina) Daily Record 29 Jan. p2/4
Electronic press kit was coined simply to refer to a press kit contained in some electronic format (today, this is typically a digital format). It appears that the term caught on in industry circles in or shortly before 1982, and was commonly used in connection with Universal Studios in their promotion of "Conan the Barbarian," ostensibly a film adaptation of a comic.
Armstrong devised an "electronic press kit" to help "Conan" sell. It contains 55 minutes of interviews, film clip and features that can be dropped into TV news shows.
Universal is spending more than $1 million on these kiits [sic] for 10 new releases and 20th Century Fox has similar plans.