What are the excepted codecs for mp4 player?

How do I know if the codec on my mp4 player is acceptable for Sparkle or
Site Ground?
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The acceptability filter is determined by what web browsers in prevalent use will work with. The coded you need to use is h264 for video and mp3 for audio. That’s the default setup of handbrake.fr, which is excellent for transcoding video to a size and bitrate suitable for the web.