iMovie thumbnails are black in Photos
I use Final Cut Pro 10 and iMovie 10 to produce my videos on a MacBook running High Sierra. Does anyone know how to get a thumbnail to appear for iMovies and FinalCut movies imported into Photos? They all show up as a black window (with duration) - VERY irritating, and tedious to find the one I want to play!
null-OTHER, iOS 10.1, Photos app