Hi KISOTH KUMAR,
Thanks for reaching out to Microsoft Q&A Forum. I understand you are facing The Windows Camera app error 0xA00F4271 <MediaCaptureFailedEvent> (0xC00D36D5). Please try go to Settings > Privacy & security > Camera > Turn Camera access On and Let apps access your camera On. Under Desktop apps, ensure access is allowed for the apps you use. Then go to Settings > Apps > Installed apps > Camera > Advanced options > Reset (then Repair if still failing). If your issue persists, try go to Settings > System > Troubleshoot > Other troubleshooters > Camera.
Also, please make sure your Windows (drivers & system) are up to date.
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Best regards.