Kling AI Video Extension Overview Extend an existing video by appending additional seconds. The extension endpoint takes the of a completed video and generates a seamless continuation. Endpoint: Request Parameters | Parameter | Type | Required | Description | |-----------|------|----------|-------------| | | string | Yes | Task ID of the completed source video | | | string | No | Motion/scene description for extension | | | string | No | Extension length: (default) | | | string | No | or | | | string | No | Default: | | | string | No | Webhook for completion | Basic Extension Chain Multiple E…