I’m sorry but you’ll need the Intel cpu if you want jellyfin. You can’t control what devices your users will play the media from, and eventually transcoding will be needed. I think the amd field isn’t doing great just yet on this regard. Any old Intel cpu past the 8xxx series will have enough transcoding ooomph to handle a bunch of simultaneous transcodes, once set. But yeah you need to make sure you have acceleration for the transcodes.