Add the x264 folder to the library and scan the library. This will create duplicates of everything in the x264 folder. Then remove the main movies folder and scan again. The duplicates should go away and remove the videos in the other folders.
I have now tried the method you were telling me. I think because I have changed the Agent some time ago, It now scans exisiting movies as new movies and add them to recently added movies
So some movies become duplicates. And when I delete HDD - Movies after adding HDD - Movies - x264 All my movies were gone. When I did an update of the whole library, they start appearing again but as new added movies.
Nope. That doesn’t change the agent already used for those items. If there aren’t too many that have a different agent, you can manually rematch those so they do use the same agent to make them into duplicates.