curl --request POST \
  --url https://api.mountsea.ai/gemini/video/extend \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "videoId": "task-uuid-xxx",
  "model": "veo31_fast",
  "prompt": "the camera slowly zooms out to reveal more of the landscape"
}
'

{
  "taskId": "<string>"
}