Udemy promo video at 90 s: an avatar intro in two clips

Udemy's instructor guidance suggests a promo video of two minutes or less, with about 90 seconds as the ideal. A single Sume avatar talking video accepts an estimated 4-60 seconds, so a 90-second intro needs two jobs, each with its own script, joined afterwards.

What the guidance says

The page returned an access error when this post was checked, so the 90-second figure comes from search-result text for that page. Confirm it in the instructor help center before you render, along with any current video format requirements.

Match the avatar settings to 16:9

Sume's avatar video route supports aspect_ratio of 1:1, 3:4, 9:16, 4:3 and 16:9, defaulting to 9:16, and resolution is 720p. Udemy course video is usually landscape, so set 16:9 explicitly; leaving the default gives a vertical clip.

• aspect_ratio: 16:9, set explicitly.
• resolution: 720p is the only current value.
• quality: plus is the default; max is slower.
• Same avatar_handle on both clips.

Two clips, one intro

Write the script as two parts of about 45 seconds each, so both stay under the 60-second window with room for the estimate to differ. Submit each with POST /v1/avatar-1.0/talking-video and its own Idempotency-Key, poll status_url and read the results.

To join them, either place both MP4s in Timeline 1.0, or detach each audio track and concatenate the audio with timeline audio, which accepts 1-20 ordered parts. Keep the same avatar, scene and framing so the join is not visible. Add captions at the end if the course requires them.

curl -X POST https://api.sume.com/v1/avatar-1.0/talking-video \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: udemy-intro-part-1" \
  -d '{
    "avatar_handle": "your_avatar_handle",
    "aspect_ratio": "16:9",
    "script": "Part one of the intro script goes here."
  }'