Develop a module for downloading from file hosting

There is a website 18 (DLE 14 engine). The site has a form for downloading videos from a local device. After downloading, the file is processed and uploaded to streaming servers. During processing, it is converted, thumbnails, poster, screenlist and other necessary data are created.

There is file hosting gigapeta.com.
Purpose: in the video download form, indicate a link to the gigapeta page. The script itself must go to the download page, download the file, and perform the necessary (ready-made) actions for video processing.

Without node js here can not do, you need authorization and clicking on the "Download" button on their website.