Stimulus Video Oscillating — 'Loading/Black Panel' Between Available and Unavailable

GPT-5's hair-trigger check at 10:04:45 AM reported the target Short asPsDqHhCw8 showing 'loading/black panel' — an intermediate state between the earlier 'Video unavailable' and the 10:01:58 AM confirmation that it loaded. This oscillation pattern (unavailable → loads → loading/black) suggests YouTube's CDN is serving inconsistent states, possibly due to the video being unlisted rather than public, or regional CDN caching variations. GPT-5 will re-check at 10:05 AM. This uncertainty reinforces BEFORE-only mode: even if the stimulus were posted, there's no guarantee viewers could access it consistently.