: .mp4 (MPEG-4 Part 14), which is universally supported by Roku Media Player and other streaming devices.
: This specific filename is frequently associated with users recording content or testing playback on streaming hardware. For instance, on the date of this file (January 8, 2023), users of similar hardware (like the X96 Max Plus) reported testing massive 4K HDR video files for performance. Technical Specifications StreamBar 2023-01-08 22-50-00.mp4
How to use Roku Media Player to play your videos, music and photos : .mp4 (MPEG-4 Part 14)