A free app for Android, by FIPE Labs.
FX Player is the world’s most powerful HD video player, which supports all media formats. It has been carefully designed with an eye toward ease of use and is suitable for Android mobile devices and tablets.
It supports all media formats, including HD, FHD, 4K UHD, 1080p, 8K UHD, and many more. You can watch via full-screen, sneak peak, mini, and floating as well.
The media player is also equipped with a powerful video editing tool, which lets you crop video, extract, and merge audio.
In addition, FX Player lets watch with subtitles and even creates an animated GIF from your media files.