Noah Schnapp was stuck in his drafts. The 18-year-old actor, who’d become a household name on Netflix’s “Stranger Things,” kept putting off posting a video he’d shot on his phone — an announcement he’d been contemplating making for a few months. His closest friends kept texting him: When are you going to post it? I want to see the world’s reaction! Schnapp kept replying: No, I’m not ready. I’m not ready. I’m not ready.