News URL https://developers.line.biz/en/news/2023/02/14/messaging-api-updated/ - [Endpoint to verify the preparation status of a video or audio for getting](https://developers.line.biz/en/news/2023/02/14/messaging-api-updated/#preparation-status-20230214) - [Endpoint to get a preview image of an image or video](https://developers.line.biz/en/news/2023/02/14/messaging-api-updated/#preview-20230214)
