Play failed: DOMException: Failed to load because no supported source was found

In write a code that will loads a video with XMLHttpRequest to HTMLElement using media source and playing it as soon as it can.
But (I having this error in this example: Play failed: DOMException: Failed to load because no supported source was found.)
Error pic

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I tried evry thing to solve this error but nothing solve it, plz give me the solution.