"More Info" always "Fetching..." when I "Get Info" from a file
The problem was that I had Spotlight disabled. I disabled it because performance. I really never use it.

Would be great if Finder could get that metadata on the fly if it can't find them indexed.

To active Spotlight again:

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist