How to get fresh download if video is created with the help of api?

I have used "/talk --POST" api to create video and got result on "/talk --GET".

After few days if i try to download same video from same api { result_url: "downloadable link"} it says "Request has expired". possible you are providing "presigned url of aws".

So how do i get fresh download url or presigned url from request? or is there any alternate api?