: It is an international standard (ISO/IEC 14496-14) supported by nearly every device, from Windows and iOS to gaming consoles and smart TVs. Internal Structure: The "Box" System
An MP4 file is not the video itself, but a that wraps around various data streams.
: It uses high-efficiency compression (like H.264 or H.265) to maintain good quality while keeping file sizes small and portable.
: It stores video, audio, subtitles, and still images.
: Contains the actual encoded video and audio frames.