Okay, I had to admit that seemingly I remembered wrong regarding the video recording.

Here is my test result, I hope you find it useful:

on 2.0.4.13:
- jolla-camera: records video and can be saved.
- advanced camera: not tested
- cameraplus: records video and can be saved.

The video then can be played from Gallery
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on 3.2.0.12
- jolla-camera: records a video but when I tap on the stop button to save what I recorded, it is crashing. After the crash jolla-camera or Advanced camera cannot be started. Reboot is required.
- advanced camera: when I hit the record button, it crashes
- cameraplus: version 0.0.30 cannot be installed because of missing libsndfile. (Even if I install libsndfile, it still doesn't find.) 0.0.29 installs but doesn't start error message: "symbol lookup error: /usr/share/harbour-cameraplus/lib/libqtcamera.so.1: undefined symbol: eglGetCurrentDisplay"

The video (created under 2.0.4.13 or other) can be played from Gallery.
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on 3.2.0.12wip0.16
- jolla-camera: freezes if I tap on the red button to record a video. The app can be closed, no reboot required.
- advanced camera: freezes if I tap on the red button to record a video. The app can be closed, no reboot required.
- cameraplus: version 0.0.30 cannot be installed because of missing libsndfile. (Even if I install libsndfile, it still doesn't find.) 0.0.29 installs but doesn't start error message: "symbol lookup error: /usr/share/harbour-cameraplus/lib/libqtcamera.so.1: undefined symbol: eglGetCurrentDisplay"

The video (created under 2.0.4.13 or other) can be played from Gallery.
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I could not test 3.0.3.9 and 3.1.0.12 as already deleted them, but I think the video recording worked fine on 3.0.3.9 (unless I mix this up with 2.0.4.13)

Seemingly there is a problem in the latest version. The cameraplus might work if it was recompiled for 3.2.0.12.