Help! Suddenly, pictures AND QuickTime impossible open/read my .mp4 videos my baby home!

I was looking through the old videos of my daughter's House, and most of them cannot play. First pictures says it can't open it so I want to try QuickTime and then he can't either! Here are the mp4, they should be playable. I'm including two screenshots, I'm so afraid of losing valuable images, please help.

Where your photo library is stored? It's in your pictures folder?  Or on an external drive?

Check out the videos trying to export one of the videos. Select the video in the Photos, then use the command "file > export > export original unmodified...» ».

You can export the video?  You can open it in Quicktime?

Tags: Mac OS & System Software

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