How to download videos to gallery from this website ?

On Instagram, some bios contain website links that redirect to a folder full of videos. These videos only open if you install special players like Medix Superior Player or FluPlayer. Even then, the players don’t allow saving the videos to the gallery.
How can I download these videos?

The porn I want to download
link -


Either tell me where to download full video or how to download from this link.