Panasonic Lumix S9 Owner's Manual page 476

Playing Back and Editing of Images – [Video Repair]
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It may not be possible to repair videos with a short recording time.
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It may not be possible to repair videos in some cases due to the state of the data.
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Video repair cannot be started if there is very limited free space on the card.
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Do not turn off the power or remove the card during repair.
Otherwise, the card and recorded data may be damaged.
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Do not perform other operations during the repair.
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You cannot repair videos recorded with devices other than this camera.
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