OpenAI shut down its Sora video API: sora-2 and sora-2-pro report
shutdown_date 2026-09-24 and POST/GET /v1/videos now return HTTP 404 for
every project. Every video_generate call routed to openai/* failed with an
opaque "OpenAI video generation failed (HTTP 404)", and because the bundled
openai plugin still advertised a configured video provider, agents on
OpenAI-only installs kept selecting it.
Remove the OpenAI video-generation provider, its manifest contract and
metadata, live-test defaults and workflow filters, and the docs that
advertised Sora. Stale openai/sora-* refs need no migration: the media
runtime already skips them with "No video-generation provider registered
for openai" and continues to configured fallbacks or auto-detected
providers.
