Video Codec settings
With that in mind, when you finish your edit just navigate to File “Export” Media. In the Export Settings panel under format select H.264 which is the officially supported video codec by YouTube required for all videos uploaded on the platform.
Bitrate Settings
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There are many programs that supports to handle 4K video conversion such as Wondershare Video Converter Ultimate, 4K TV Converter, Acrok Video Converter Ultimate, BlackMagic 4K Video Converter, Pavtube Video Converter Ultimate, etc.