If you were exposed to Horror, chances are that it was in a Short Form - that is, short story collections, tales in comic books, and anthologies both on TV and in the cinemas. These were the days prior to the success of novels like The Exorcist and Carrie, and before the continuing character TV series like Kolchak: The Night Stalker, The X-Files and Friday the 13th: The Series. You got to figuratively dip a toe in the water of terror, test your endurance, and then decide if Fear was the emotion for you. Unless you went to your local theater for a movie, the films you were exposed to were on commercial TV, edited for content, but more importantly interrupted by advertising every 10-14 minutes or so. Your Horror came to you in small doses, so that by the mid 70s, you were old enough and tested enough to seek out stronger, longer stuff...and both Hollywood and the publishing industry complied, both enjoying the kind of halcyon days that have never quite re-appeared since. And, as it's easier to suspend disbelief for a shorter period of time, these efforts were frequently, chillingly successful.
So exactly how omnipresent was this Short Form Horror? Let's look at it medium by medium...
FILM - The early 70s saw the culmination of a long stretch of anthology films, primarily popularized by the filmmakers at the UK's Amicus Studios, but with occasional offerings from others. From 1962 to 1975, audiences turned many of the following movies into major box office hits:
Tales of Terror, Twice Told Tales, Black Sabbath, Dr. Terror's House of Horrors, Asylum, The House That Dripped Blood, From Beyond the Grave, Tales from the Crypt, Tales That Witness Madness, Torture Garden, The Vault of Horror
And these movies, thanks to their episodic nature, lent themselves nicely to commercial breaks when televised on the late, late show. (Once author Robert Bloch became a household name due to Psycho, producers sought out his considerable back catalog of short stories, which formed the basis of many of these movies.) We've seen the occasional anthology movie since - most likely based on Stephen King short stories - but nothing like the proliferation of this era.
TELEVISION - Anthologies were the very foundation of TV's early days, with original live dramas bringing class and credence to the new medium. Eventually these became some of TV's most storied (no pun intended) series:
Alfred Hitchcock Presents, The Alfred Hitchcock Hour, One Step Beyond,
When they were not televised as first-run shows, they were staples of local syndication. This format continued into the 1980s with shows like Tales from the Darkside, Monsters, The Hitchhiker, Ray Bradbury Theater, Roald Dahl's Tales of the Unexpected and Tales from the Crypt. But with a paltry few exceptions, anthology shows have all but disappeared over the last 20 years.
It should also be noted that made-for-TV movies, especially from ABC, became the de facto Playhouse 90 of their era, with such watershed films as The Night Stalker, Duel, Don't Be Afraid of the Dark, Trilogy of Terror, and dozens of other lesser examples. Seldom did a week go by in the early 70s that one of the three major networks did not show an original movie that had its roots in Horror, Suspense, SF or some combination of the genres.
COMIC BOOKS - It may seem difficult to believe today, but Horror anthology titles routinely outsold books featuring Superman, Batman, and The Fantastic Four. After the shooting star that was EC in the early 50s, Horror titles skulked around the fringes of comicdom, taking a back seat to SF collections offered by the major publishers. But thanks to the efforts of people like publisher Jim Warren and editor Joe Orlando, Horror made a comeback in a BIG way, so that, by the early 70s, here are all the titles that were available from the various publishers (and I'm sure to be forgetting some):
DC - The House of Mystery, The House of Secrets, The Unexpected, The Witching Hour, Ghosts, Weird Mystery Tales, Secrets of Sinister House, Forbidden Tales of Dark Mansion, Weird War Stories, Weird Western Stories, Black Magic, Ghost Castle
Marvel - Journey Into Mystery, Chamber of Chills, Where Monsters Dwell, Where Creatures Roam, Monsters on the Prowl, Creatures on the Loose, Fear, Uncanny Tales From Beyond the Grave, Crypt of Shadows, Dead of Night, Vault of Evil, Beware!, Weird Wonder Tales, Supernatural Thrillers (plus late 60s titles Tower of Shadows and Chamber of Darkness)
Gold Key - Boris Karloff Tales of Mystery,
Charlton - The Many Ghosts of Doctor Graves, Midnight Tales, Haunted, Creepy Things, Scary Tales, Ghost Manor, Ghostly Haunts, Ghostly Tales, Haunted Love, Monster Hunters
Warren Magazines - Creepy, Eerie, Vampirella
Marvel Magazines - Dracula Lives!, Vampire Tales, Tales of the Zombie, Monsters Unleashed, The Haunt of Horror, Masters of Terror
Skywald Magazines - Psycho, Nightmare, Scream
Add a variety of smaller publishers and less-accomplished magazines (please don't make me go into Witch's Tales and its ilk), and you can see how much space on the newsstand Horror anthology comics occupied during this time.
BOOKS - Before there were novels, there were anthologies. Kids were raised on collections "edited" by Alfred Hitchcock (Monster Museum, Ghostly Gallery, and many others) and Boris Karloff (Tales of the Frightened), and then graduated to omnibus volumes from Peter Haining, Groff Conklin, Damon Knight, Joan Aiken, Hugh Lamb, Vic Ghidalia, Roger Elwood and many other master anthologists. (The back pages of Warren Magazines were filled with ads for book after book of short story collections.) If you had a particularly continental bookseller, you may have been able to pick up copies in the UK's once-venerable Pan Book of Horror series, or Tales of Unease. Even the lowliest drugstore's paperback rack would feature a half-dozen Horror collections on any given day in the early 70s. Authors like King, Koontz, Saul, Herbert and Farris would eventually appease the new demand, but for years, these anthologies were Horror.
So, while we'll certainly never see a return to those days of Short Form Horror, I wonder - are the kids who are getting their kicks from YouTube terror hankering for something that's simply...shorter?