To keep 4K files manageable, the MP4 container uses advanced compression algorithms (codecs). Explaining Digital Video: Formats, Codecs & Containers
MP4 (MPEG-4 Part 14) is the world's most popular digital multimedia container. It is a "wrapper" that holds several types of data together in one file: The visual data compressed by a codec. 3816mp4
It provides four times the detail of standard 1080p HD. To keep 4K files manageable, the MP4 container
The "38" in 3816 often serves as shorthand for the pixel resolution, widely known as 4K UHD. It provides four times the detail of standard 1080p HD
While "3816mp4" is not a standard industry term or a standalone software product, it typically appears as a specific filename or an identification string for high-resolution video files. In technical contexts, this identifier often refers to video, which has a horizontal resolution of 3,840 pixels .