Just an FYI, I am pretyy new to KDE. I had installed KDE Neon 5.19. When 5.20 came out I decided to do a clean install. This went well until I downloaded the Dolphin FFmpeg Thumbail addon. Download is fine, no errors. Shows installed in Discover. But, it is not listed as a service in Dolphin and I do not have thumbnails. I work with video files a alot and I simply can't remeber every file name for everything. I use the thumbnail to find what i am looking for. So, I need this to work. I had it working on 5.19. But, honestly I rember just downlading it from Discover and it working. Not this time. I have installed, uninstalled, begged it to work, pleade with it to work... nothing. But really, it's 2020 I don't understand why this isn't just part of Dolphin at this point. Why the seperate download? Especially when it doesn't seem to work.

... and Poof, it just started working.... have no idea why. So... all's well that ends well.