I have recently found out that my videos in Plex buffer a lot when they are X265 file type because my current PC I use plex on doesn’t have much power to transcode the audio.
I have tried following a few guides/reddit posts on how to do this but it doesn’t seem to download the shows when they are released any more. It will download if I tell sonarr to search monitored.
Must Contain is missing X variants, Must Not Contain is missing HEVC, and Preferred isn’t necessary but presumably you don’t mean to have that last entry.
Also to set expectations: these are terms that must / must not be in the release name. Sonarr can’t know the codec until after the release is downloaded. Unless it is specifically written in the release name of course.