curl --request POST \
  --url https://api.weryai.com/v1/generation/video-extend \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "video_url": "https://example.com/video.mp4",
  "prompt": "a calm ocean scene",
  "style": "anime",
  "resolution": "720p",
  "duration": 5
}
'

{
  "status": 0,
  "desc": "success",
  "message": "success",
  "data": {
    "task_id": "task_abc123",
    "task_status": "waiting"
  }
}