The first mistake is assuming the group chat exists to receive your findings. It exists to decide where dinner is, share a blurry dog photograph, and pretend everybody will be free in November. Your seventeen-part thread about the end of civilization competes directly with tacos.
Begin with an unearned sense of urgency
Send “You need to see this” with no summary. The video should last longer than a dental appointment. If someone asks what it says, tell them it cannot be explained in a message. This demonstrates respect for everyone’s time by demanding substantially more of it.
Escalate disagreement into evidence
When your sister says she has a meeting, explain that this is precisely how systems keep people distracted. When your cousin sends a thumbs-up, interpret it as awakening. When your father leaves the chat, log him as a hostile actor.
Prepare the eventual vindication
Keep screenshots. Not useful ones containing specific claims and dates. Keep the part where you wrote “something is coming.” Something always is. It might be Tuesday. The discipline lies in maintaining a broad enough definition of catastrophe to include a delayed grocery delivery.
Consider an unconventional alternative
Ask whether people actually want to discuss the subject. Share a short explanation with a source instead of a demand to watch something. Accept “not tonight.” You can care about serious problems without assigning your family a mandatory continuing-education course in your fear.
The most durable emergency supply is a person who still answers your phone calls. Even we do not sell a replacement for that.