This conversation has been merged. Please reference the main conversation: Lightroom 6.3: Cannot import, preview or play video unless signed in to Creative Cloud
Since 6.3, I'm unable to view or import or anything with videos made in iPhone 5s (at least). Standard videos 1080 AAC, standard from the iPhone. If I try to import never shows the preview and then I need to cancel the import process. And then if I quit LR then never quits... stays forever until I need to "force quit" the application.
Of course, putting the files in the folder manually and then making "synchronise folder" has the same results.
Apparently, since 6.3 something is wrong.... again.
I'm using the full license LR (not CC) and iMac 5k 2014 with Radeon R9 M290X