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The demo page for the blog articles

Play Local MP4 Video Files in Your Browser (part I): Pure JavaScript Video Player Tutorial with MP4Box libraryPlay Local MP4 Video Files in Your Browser (part II): MP4 file fragmentation in pure JS using ffmpeg library in browser

Playing a video file directly

This page allows to verify if a video file is playable using MSE mechanism as it is, without any preprocessing.
Recall that for a video file to be suitable for modern browser's Media Source Extension (MSE) it should be fragmented.

Detailed structure of a video file, including metadata