Love my Jellyfin box :) I'm using Jellyfin on docker, host OS is ubuntu server 22.04. My CPU is an Intel 13000 & the iGPU works great for transcoding. It's all packed into a tiny Inwin Chopin, and it's basically silent with the stock cooler. I store all my movies on a Samsung 870 4tb right now, bad form I know. Long-term I'll upgrade to a full NAS array.
A warning to the wise tho, this took tons of time & effort to set it up this way. Only pursue if interesting in Linux! (Or use one of the OS mentioned in the article to make it a little easier on yourself)