I am using LR CC 2015 (2015.4) and have videos in my catalog. I have multiple videos in a Folder and thumbnails or them are displayed in the thumbnail mode. When I click on a video to see a larger view, it doesn't display but comes back with the error message, "There was an error working with the video." The Play button at the bottom of the screw is dead and doesn't allow the video to be played. It's frustrating has it has been working until yesterday and then has not worked since. Appreciate your assistance and recommendations!
I'm running on a Mac OS V10.9.5 with 16 GB Ram.
Moved this to the lightroom forum so you can get better help.
Seeing this as well. Latest LR CC.