kodi.tv doesn't require any account either. The 2TB SSD I have connected to the RPI hosting it works as a good enough media server for my whole network. I love the unique channels and the ability to stream Newpipe from phone to it. I might try Jellyfin to learn its features.
Not sure how you've setup Kodi however I switched from Kodi to Jellyfin about a year ago.
I purchased a low powered computer with a Celeron N5100 (sorry I might have the model wrong) but I was looking for something that could support and transcode modern video formats in hardware, and connected my external drives too. From there I was able to install Jellyfin, then the Jellyfin clients on all my devices (TV, Phone, iPad etc).
It seems to work really well, espeicaly when exposing the server to the internet using nginx, a SSL certificate, DNS and a dynamic DNS provided by my Asus router. Unsure of the security of this or how to harden it -> VPN might be better for more security conscious people.
You mention you like the unique channels and the Newpipe feature, I don't think any of this is available in Jellyfin, it doesn't seem to be very customisable at all with the exception of a limited list of plugins.
