plays video files in mp4/mov/mkv/avi/m4v/ts/m2ts file extensions. supports hardware decoder, codecs support depending on device capabilities. supports subtitle files in srt/ssa/ass formats. text to speech narration for subtitle files. (not available on all Amazon devices, available in general Android TV devices). 1x/1.5x/2.0x playback speed. dual stacks subtitle display - display 2 subtitles at a time. video thumbnails. photo viewer. Google Drive API support.