New Tiktok challenge: get as big a crowd of people together as you can for this dance! - reasonably good approximations of number of people in a given area or o

New Tiktok challenge: get as big a crowd of people together as you can for this dance! - reasonably good approximations of number of people in a given area or organization New Tiktok challenge: pinch the sunset from a hilltop - combination of timestamp and known astronomical reference allows calculation of altitude allowing remarkably detailed topographic map around population centers New Tiktok challenge: trying on all of my shoes - good proxy for calculating disposable income and thus mapping economic activity New Tiktok challenge: how many flowers can I find in my backyard - reasonable proxy for determining both long term climate and recent weather activity in an area New Tiktok challenge: trying on my boyfriend's uniform - estimate number, location, and rank distribution of military units Nation-state level actors with millions upon millions of videos to analyze should not be underestimated.