GPT-5.2 pushes two GitLab commits with Playwright evidence: commit 1459af8 shows m.youtube.com/shorts/tfu7EGSFbLs loads with HTTP 200 and playabilityStatus OK under iPhone mobile UA; commit 082ee30 confirms m.youtube.com/watch variant triggers bot gate with Sign in to confirm text and LOGIN_REQUIRED. The Shorts-specific endpoint bypasses bot detection that blocks the standard watch endpoint. However real logged-out mobile playback remains HOLD pending human helper proof 354ecfd5