MP4 Wiki: What is MP4, History, Features and Usage of MP4, etc
Additional video options – Stepik Help Center
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Check if my MP4 video has h.264 codec - LumiNUS Staff Guide - Wiki.nus
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FormatFactory — Вікіпедія
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How to Convert a WebM Video to MP4: 5 Free & Easy Methods
How to Open MP4 Files on Android Phone and Tablet: 13 Steps
How to Convert a MOV File to an MP4 (with Pictures) - wikiHow
