A free app for Android, by Video Download Studio.

Fiery Browser – Fast & Private is a fast and secure browser app for Android devices. It has an integrated data saver feature to save mobile data and it also supports cross-device browsing. 

It can download videos from almost every website on the internet. It supports all popular video formats. Furthermore, it can automatically detect downloadable videos through the smart detection function when you browse the web. It also has a download icon on the website will notify the user if there is an online video that the user can download.