Create a video from a template

JSON Params	Description
test	Type: Boolean Describes if the video is a test video. Test videos do not count towards your quota but are rendered with a watermark. Defaults to `false`.
templateId*	Type: String Unique identifier of the template from which to create this video. This may be retrieved from the templates page in STUDIO.
templateData*	Type: Object Set of key-value pairs where the key is the variable name defined in the template and the value is the variable value to be used in the video. For image and video variables (for example, the background of a video), you may provide either the URL of the asset you'd like to use or the asset ID of a created asset. All text variables are HTML escaped by default (e.g. `&` would become `&amp`). In order to prevent escaping of HTML use {{& variable}} syntax in script, text elements.
title	Type: String Title of the video (used on the video's share page). Defaults to the template title.
description	Type: String Description of the video (used on the video's share page). Defaults to the template description.
visibility	Type: String Describes the private 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. Defaults to `private`.
callbackId	Type: String A callback ID that you may attach to the `Video` object. This is useful in the scenario where you need to store additional metadata on the video.

{ 
  "title": "Hello, World!", 
  "description": "This is my first synthetic video, made with the Synthesia API!",
  "visibility": "public",
  "templateId":"1234-...",
  "templateData": {
    "name": "John", 
    "background":"https://...", 
    "logo":"1234-..."
  },
  "test": true,
  "callbackId": "[email protected]",
}