An MP4 is not a video itself, but a digital "container" that wraps multiple data streams—video, audio, subtitles, and metadata—into a single package.
: It is the native standard for YouTube , Netflix, and almost every smartphone and social media platform. 1_5064547297103184456.mp4
: By placing the moov box at the beginning of the file (a process called "Fast Start"), the video can begin playing before the entire file has finished downloading. Why This Format is Dominant An MP4 is not a video itself, but
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