CORS Troubleshooting Checklist (m3u8 / ts / key)
Published：2026-02-04 · Read 12 min
Actionable CORS checks for playlist, segment, and key requests.
Cover all resource types
Do not only configure CORS on the m3u8 file. Segments and keys must also allow origin access.
Verify headers through CDN layers
Confirm CORS headers are preserved at edge and origin to avoid intermittent failures.