Comment 3 for bug 1062155

Hi,
could you confirm that your second screenshot is a home Dash preview provided by the Files lens (in the Home "Files and Folders" category, as opposed to the "Videos" category)? Previewing a file in the Home from the Videos category should give you something similar to the first screenshot.

The bug is caused by the type of preview used by the videos lens (the left side of the preview is larger, to make 16:9 videos look better, hence causing the bug). I think this should be fixed on Unity side.