"Html5: Video File Not Found" - Microsoft Community
https://answers.microsoft.com/en-us/microsoftedge/forum/all/html5-video-file-not-found/10b4a29d-3384-4c71-9ec5-4d4d0e3e4ff4
Web ResultSep 18, 2023 · Have you tried checking if there's an update available for your Microsoft Edge app? If it's up to date, try clearing your browser's cache, cookies, and site data by tapping on the hamburger icon > then tap on Settings> Privacy and security > clear browsing data > select All time then clear. Let me know how it went.
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