This page exists for exactly one person: the owner of the Science Facts Daily YouTube channel. It runs the one-time "Sign in with Google" step that produces a refresh token for the channel's own upload automation (a small program that posts the owner's daily science-facts Shorts from the owner's own machine).
It asks for a single permission — upload videos to your own channel — and hands the resulting token back to you on screen. Nothing is stored on this site: no accounts, no database, no analytics.
After signing in you will see the token once. Save it into
~/workspace/.secrets/youtube-shorts.env on the machine that
runs the pipeline.