HOW DO I RECOVER SNIPPING TOOL'S MISSING CLIPS FROM A RECORD?

[Windows 10]

I USED SNIPPING TOOL TO RECORD A MEETING IT WAS ABOUT AN HOUR AND HALF. WHEN I SAVED IT, IT ONLY SHOWS THE 3 FIRST 3 MINUTES OF THE RECORDING. I ALSO TRIED RUNNING WINDOWS + R BUT IT JUST SHOWS THE 3 MINS, HOW DO I FIND THIS? THE RECORDING WAS VERY IMPORTANT

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