when I try to record a video with the rear camera using the pre-installed camera app of my Fairphone 3, the picture shown in the display freezes. The seconds are counting, but when I hit the stop-button there is no video recorded. The front camera (selfie camera) does record videos.
When I use another app (like open camera) the video funtion does work for both cameras. What could be the problem? Open Camera does work but has limited functions, so I would like to use the standard camera app.
Did you try delenting camera cache or deactivating and reativating the app again? (You can do this in Settings → Apps and notifications → Show all apps; maybe the name of the menu is different, as my FP3 is not in english and I’m supponsing the translation ). Also in Camera app settings you can choose “Reset to default” at the bottom of the settings menu
Another thing you can try is check the storage folder? Maybe it’s a problem with the SD Card, and changing it could solve your problem . Note that this setting is independent for each camera (front and rear) in the default camera app:
). Also in Camera app settings you can choose “Reset to default” at the bottom of the settings menu 
. Note that this setting is independent for each camera (front and rear) in the default camera app:
Deleting the camera Cache worked - everything’s fine again. Thank you!