First I must say I am a complete novice on videos...................

This have happened two times.
First time on the first flight of the day
Second time on the second flight of the day (a couple of weeks later than the first time. All other videos before and after are just fine)

When I shall replay the video this pops up:
(quote) This file isn’t playable. That might be because the file type is unsupported, the file extension is incorrect, or the file is corrupt.

In both cases the number of the take adds up correctly, and the amount of MB is correctly indicated. But I cannot play the video and get the quoted message on the screen.
The drone is a Mavic Mini
Card is SDS Micro Ultra 64GB.

What is happening and can the footage be saved?
Have anybody experienced the same?
What I find strange is that the videos before and after these cases are just fine. No battery change and no parameter changes on the drone, just landed in between the flights and turned of the filming.
Oceantop

Hi there, please check if the video can be played in the Playback in DJI Fly app, if yes, you may check it again on the computer, or use a different player.