No preview of .MOV Data in Bridge CC 2019

Hello,

So I have a recent problem with Adobe Bridge:

Yesterday I was working on some raw .MOV Data and everything worked fine. Today I opened up Bridge and it didn’t show a preview anymore.

Note that it was different .MOV Data than yesterday! New importet to the iMac. But there’s no difference to the other files.

Some facts:

I work on an iMac 10.14.1

Adobe Bridge 2019 and Camera RAW are up to date

Quick Time is installed

I already tried clearing the Bridge cache and restart the App

Any other ideas what could cause this problem now?

I can still open the videos with other apps, just the preview in Bridge is not working anymore.

Best regards