Spins up the local break-manifest server, creates a channel with a pause ad (position: 'pause', format: 'pause'), and loads an SGAI session. Press play, then pause the video — a full-screen pause image or video appears, with a resume (play) button overlaid. Resuming dismisses it. Requires the Vite dev server (npm run dev).

Off: appears immediately on pause. On: appears after ~2 s of being paused.