Fast Video Downloader & Saver is a free multimedia app developed by Rainbow Applications Studio for Android devices. This app offers a great video player that supports all popular formats, including MP4, MOV, MKV, FLV, AVI, 3gp, and M4A. It also allows you to download videos from social media and other sites directly within the media player app.

With this app, you can easily download and save videos to your phone and watch them later without an internet connection. The app is easy to use, with a simple interface that makes it convenient for users to download and rename videos. You can also protect your private videos with a password so that nobody else can access them.

Overall, Fast Video Downloader & Saver is a great app for anyone who wants to watch and download videos on their Android device. It is still in development, so feedback is welcome. Please note that downloading files protected by copyright is prohibited and regulated by law.