video on my landing page in Wix

I have a Wix website and want the best video to load with minimal problems.  I am using Wix.  I have someone developing a animation explainer video.  Is there a specific file type that he needs to make it in to produce the best results?  How do I end up loading it to my Wix site?  I could contact their support but I figure I might as well ask that also here.
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look at this:
and this:

no specific file type is needed - use a quality video player like mediaelement.js ( and use a file type of .mp4 will give the best results for the widest audience I believe ...

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