Random [Transcoder] [eac3_eae] errors only for TV shows?

you can put multiple directories on the command line.

Obviously more than 8192 so there is the problem.

Let’s set the fs.inotify.max_user_watches=65536 /etc/sysctl.conf

Be careful on Unraid. Don’t put it inside the container.
This must be the system’s /etc/sysctl.conf. The container draws on the host services and if the host is limited to 8192 (default) then that’s all it will get.