All webhook events follow the same pattern. At the top level, there will be two keys: one that describes the event that occurred, and one that contains the event-specific payload.

{
  "type": "video.completed",
  "data": {
    ...
  }
}

Object Keys	Type	Description
type	string	The event type. Available event types: `video.completed`,`video.failed`.
data	JSON	The event payload.

video.completed

The video.completed event is sent when a video finishes processing.
Note: This event is not sent when a template preview is completed.

Object Keys	Type	Description
callbackId	string	Arbitrary metadata set for the video when creating the video.
captions	JSON	A JSON object with time-limited download URLs for the video captions in `vtt` and `srt` formats.
createdAt	integer	UNIX timestamp representing the time video was created.
description	string	Description of the video (used on the video's share page).
download	string	A time-limited URL which may be used to download the video. This field is only available if the video status is `complete`.
duration	string	Duration of the video. This field is only available if the video status is `complete`.
id	string	Unique identifier for the video.
lastUpdatedAt	integer	UNIX timestamp representing the time video was last updated.
status	string	Describes the processing status of the video. `in_progress`: the video is being processed. `complete`: the video was processed successfully. `error`: an error occurred during processing. `rejected`: the video was rejected during moderation due to inappropriate content.
title	string	Title of the video (used on the video's share page).
thumbnail	JSON	A JSON object with time-limited download URLs for static (`.jpg`) and animated (`.gif`) video thumbnails. This field is only available if the video status is `complete`. If an animated GIF thumbnail is not present, only the URL for the static thumbnail will be returned.
visibility	string	Describes the visibility settings of the video. If `public`, the video's share page is active. If `private`, the video's share page is not active; visitors will receive a 404 Not Found response.

{
  "type": "video.completed",
  "data": {
    ...
  }
}

{
  "data": {
    "callbackId": "john@example.com",
    "captions": {
    	"srt": "https://...",
   	 	"vtt": "https://...",
  	},
    "createdAt": 1602512112,
    "description": "This is my first synthetic video, made with the Synthesia API!",
    "download": "https://...",
    "duration": "0:00:59.000000",
    "id": "1234-...",
    "lastUpdatedAt": 1602512112,
    "status": "complete",
    "thumbnail": {
    	"image": "https://...",
   	 	"gif": "https://...",
  	},
    "title": "Hello, World!",  
    "visibility": "private"
  },
  "type": "video.completed"
}

video.failed

The video.failed event is sent when a video fails to process.

Object Keys	Type	Description
createdAt	integer	UNIX timestamp representing the time video was created.
description	string	Description of the video (used on the video's share page).
id	string	Unique identifier for the video.
message	string	Describes why the video failed to process.
status	string	Describes the processing status of the video (`error`).
title	string	Title of the video (used on the video's share page).

{
  "type": "video.failed",
  "data": {
    ...
  }
}

{
  "data": {
    "id": "1234-...",
    "title": "Hello, World!",
    "description": "This is my first synthetic video, made with the Synthesia API!",
    "status": "error",
    "createdAt": 1602512112,
    "message": "Video failed: User does not have access to Avatar 1234-abcd"
  },
   "type": "video.failed" 
}