Wan 3.0 two-second clips for Reddit video ads

Yes: wan-3.0 on Sume accepts 2 to 30 seconds per clip, which covers the shortest placements such as a 2 second Reddit ad. Most catalog models start at 3 to 5 seconds, so a 2 second clip is a model choice, not a trim.

Minimum lengths differ by platform

Platform minimums are not uniform. A Strike Social guide lists Reddit video ads at 2 seconds to 15 minutes, with 5 to 30 seconds as the recommended range. I did not confirm minimums for other placements, so check each platform's own spec sheet and pick the model by the shortest placement you plan to buy.

Check the limits from the catalog

Sume documents limits per model: wan-3.0 accepts 2-30 seconds, seedance-2.5 accepts 4-30 seconds, and every other catalog model tops out at 15 seconds. Do not hard-code these numbers. Read supported_durations, supported_resolutions and supported_aspect_ratios from the catalog before you submit.

curl "https://api.sume.com/v1/videos/models" \
  -H "Authorization: Bearer $SUME_API_KEY"

Submit a 2 second clip

The request below uses the Video Router path with an idempotency key, so a retry after a network error does not create a second paid job. Resolution and aspect ratio are left to the model default; add them only after confirming the catalog lists them for wan-3.0.

curl -X POST https://api.sume.com/v1/video-router/generate \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: wan-bumper-001" \
  -d '{
    "model": "wan-3.0",
    "prompt": "Product on a desk, slow push-in, soft daylight",
    "duration": 2,
    "mode": "async"
  }'

What a short clip changes

Sume reserves the workspace balance on submit at provider list times 1.25, so confirm the price in the catalog before a burst. Two seconds also leaves little room for a story: one subject, one motion, one idea. If the same asset must also run at 15 or 30 seconds, request those lengths as separate jobs rather than stretching a bumper.