glass.watch() — the player companion

A generic <video> (license-free slate, illustrative Meridian Stream captions) driven by the programmatic SDK API. One call — Glass.init({apiKey}).watch({ player, videoId, mount }) — mounts the GlassWatch companion beside the player: interactive transcript, tap-to-explain terms, and a catch-me-up recap. AI is gated on turn-on ($0 mock).