I use Lightroom 6.12, Windows 10 Pro 64bit. Probably after the recent update, I started to get "Preview unavailable for this file" and "There is a problem with the video file” for all MOV files in SD cards and can not import them. Those MOV files are fine and viewable in other software. Only Lightroom refuses them AFAIK.
Lightroom was able to preview and import those files before, so it seems that the latest Lightroom has some issue. Is there any solution or workaround for this?