"October Is Coming (UP).mp4" is a viral social media trend and meme often featuring a clip by creator Sebas T84 to signal the start of "spooky season" and October birthdays. The trend, which often utilizes the .mp4 format suffix to signify a shared, archived video, is frequently associated with pop culture moments like Mean Girls Day or autumnal romance videos. Explore more October-themed content on TikTok . October Is Coming: Cozy Moments with Plush Toys