I've been on the Internet since the late 2000s. Some of my most salient memories are of Internet horror. I lived in fear of randomly encountering the Jeff the Killer image. I believed to some degree that Slenderman was real and out to get me. I remember messaging a girl I liked about it and her panicking, rightfully. Internet horror has never been out of style, but right now we have access to more than ever before, with better tech and higher budgets. A lot of these are analog horror, but there's other kinds like digital horror in there too. I'm using the names of the accounts where you can find the rest of their work, rather than real names.
Local 58:
The original. I like Local 58 because you can show one video to freak out your friends and call it. The overarching story is there, but it's not as involved as some of the other entries on this list. You can ignore it, if you like. The videos work on their own. High production value, high nostalgia value. I think nostalgia is a key part of analog horror, and having the comforts of late-night TV turned against you is a feature here.
Gemini Home Entertainment:
The other original. On hold for now, as the creator's computer died. A story about bodysnatchers and rogue planet-eaters. My stance on cosmic horror is the "comprehending easily: Squid guy" tweet, but the body horror made me stay. The fan videos quarantine evaluation and infiltration by youngslaughterboy are great.
The Monument Mythos:
A series about the terrible things lying beneath American monuments. Refreshingly political, considering that the genre usually stays away from that. Figure-skates the line between comedy and horror. There aren't many conventional scares, but the premises, the ideas themselves, are scary enough.
Morley Grove Created by the same person as Gemini Home Entertainment, Morley Grove is a take on the Slenderman mythos that's good. Which is wild. He's been memed to death, so this can't have been easy. It also highlights a common trope in analog/digital horror I really love: focusing on the small scale. The small town of Morley Grove, Tennessee is terrorized by the Morley Man. Not even the whole town, just the kids, whom he takes body, mind and soul. Can be really sad at times, especially for those who've experienced grief recently.
Dog Nightmares by PiggySoda
Aamon Animations
FAKE DOCUMENTARY "Q" by pro9ramQ
Obelisk by lizardmeninc
The Backrooms by Kane Pixels
The Oldest View by Kane Pixels
People Still Live Here by Kane Pixels
Ted's Caving Journal by Alex Archives
Hollow Birds by Alex Archives
The Mandela Catalogue by Alex Kister
THE BLUE CHANNEL by Gooseworx
The Walten Files by MartinWalls