It just occurred to me, are you trying to use hardware transcoding (igpu etc) or software? Because hardware transcoding involves extra steps I believe in iocage.
Also that version info is correct, pkg/ports is usually a few versions behind https://www.freshports.org/multimedia/plexmediaserver-plexpass/
I saw this, but you might have weird permission issues if your not careful How to manually update PlexPass on FreeNAS /FreeBSD from TAR file (ending freebsd-amd64.tar.bz2)
You could check to see if the codecs are in the tarball, replying from a iPad so can’t myself.
Still makes me think it might not be able to download the codec from plex.tv which is weird.
