In my server I currently have an Intel i7 9th gen CPU with integrated Intel video.
I don’t use or need A.I. or LLM stuff, but we use jellyfin extensively in the family.
So far jellyfin worked always perfectly fine, but I could add (for free) an NVIDIA 2060 or a 1060. Would it be worth it?
And as power consumption, will the increase be noticeable? Should I do it or pass?
Most Intel GPUs are great at transcoding. Reliable, widely supported and quite a bit of transcoding power for very little electrical power.
I think the main thing I would check is what formats are supported. If the other GPU can support newer formats like AV1 it may be worth it (if you want to store your videos in these more efficient formats or you have clients who can consume these formats and will appreciate the reduced bandwidth).
But overall I would say if you aren’t having any problems no need to bother. The onboard graphics are simple and efficient.