𝐌𝐀𝐑𝐁𝐋𝐄 𝐇𝐎𝐑𝐍𝐄𝐓𝐒

what is marble hornets?

Marble Hornets is an alternate reality game YouTube web series based on the Slender Man online mythos. The first video was posted on YouTube on June 20, 2009, following a post that its creator, Troy Wagner, created on the Something Awful forum the previous day. It was the first web series  to be created around the character, with the first episode premiering exactly 10 days after the appearance of the original images of Slender Man on the Something Awful forums, and the first Marble Hornets affiliated post being 9 days after the character's creation.               

there are 92 videos on the main channel (87 entries). The series also has 38 accompanying videos from a side-channel, "totheark". These videos, as well as the eponymous "totheark", have been featured multiple times throughout the story.