Announce a new Shorts episode with a YouTube post and a video frame

Make the still for a YouTube post that points to your next Shorts episode: pull the frame with Sume video frames and keep within the post limits YouTube lists.

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Pull a strong frame from the new episode with Sume video frames and use it as the image of a YouTube post that announces it. YouTube said image posts can now be recommended in the Shorts feed, so a still can reach people who are swiping through Shorts.

What YouTube said

The 2026-09-23 YouTube post about Shorts says posts can be recommended in the Shorts feed (YouTube Blog). For image limits, see the existing post on image posts in the Shorts feed rather than a repeat here.

Pull candidates

Ask for several times across the episode, since the first frame is often a title or a fade. Up to 24 times per request.

curl -X POST https://api.sume.com/v1/video-frames \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: ep5-announce-frames" \
  -d '{
    "video_url": "https://media.sume.com/artifacts/artf_demo/ep5.mp4",
    "at": [1, 3, 5, 7, 9, 11],
    "format": "jpeg",
    "max_edge": 1920
  }'

Choose and finish

Pick the frame that shows the hook, with the subject large and no mid-blink faces. If you want a headline on it, add text in your design tool, or ask for a stylised still with the image model instead.

The tools that touch this workflow.

Making the announcement still (read 2026-10-07)
StepSume toolWhat to know
Candidate framesvideo-framesAt most 24 times per request; jpeg or png
Size clampmax_edge16 to 2160 on the long edge
Video itselfTimeline 1.0$0.10 per ceil(output minute)

Post it

Post the still with a line that names the episode number and where to watch. Keep posts and episodes consistent so viewers recognise the series.

Sources

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