Sora download URL expired after 1 hour: what Sume returns

On Sume, read unsigned_urls from a completed /v1/videos job, or call GET /v1/videos/{jobId}/content with your API key and save the file. The Sora rule to copy the file out within the hour is still a sound habit, but Sume's docs page does not state an expiry for these URLs.

Sora's guide says download URLs "are valid for a maximum of 1 hour after generation" and to copy the file to your own storage promptly; it also says the Videos API shut down on September 24, 2026. Sume facts are from Video generation, read 2026-09-30.

How does Sume deliver a finished video?

The workflow is submit, poll GET /v1/videos/{jobId} until completed, then download from the content URL. Once the status is completed, the unsigned_urls array holds download URLs. The content endpoint takes an index query parameter that defaults to 0, for models that return several outputs.

curl "https://api.sume.com/v1/videos/$JOB_ID/content?index=0" \
  -H "Authorization: Bearer $SUME_API_KEY" \
  --output video.mp4

Does the one-hour rule carry over?

What should my pipeline do?

Download on the completed webhook or poll result, write the file to your own storage, and keep your own record of the job id. For expiry rules on other Sume outputs, see do Sume video URLs expire.

What about preview images?

Video frames returns "durable artf_ images" from a clip you import, so previews do not depend on the clip's download link. The steps are in the Sora thumbnail replacement post.