: Unlike older formats, MP4 is compatible with HTML5 , meaning it can be played directly in web browsers without specialized plugins.

The most important thing to understand about an .mp4 file is that it is a , not just a video file.

: A single MP4 file can simultaneously hold video streams, audio tracks, subtitles, and even still images.

: MP4 uses advanced compression to keep file sizes small—ideal for web streaming—while maintaining relatively high visual quality.