Yep. I’m guessing it insists on transcoding the video but doesn’t have the horsepower. Plex either has a superior transcoder or detects it doesn’t need to transcode it.

For me, Plex works great on my Synology while Jellyfin is completely unusable - video payback simply crashes. Running Jellyfin on my desktop machine gets it to work, but it takes over 24 hours to scan my media library and doesn’t automatically add new media when I add new files.

Run Vodafone’s Dreamlab on it and donate CPU cycles to research.