An file is primarily a digital multimedia container format .
: MP4 files can store metadata such as chapter markers, titles, and even "Exif" or "QuickTime" timestamps, which help in organizing and indexing media libraries. (18)mp4
: Most web browsers can play MP4 files natively, making them the preferred format for social media and website backgrounds. AllDates shifting of MP4 files - ExifTool by Phil Harvey An file is primarily a digital multimedia container format