If you want direct play of the file, play around with different clients. Encoding 4k can be taxing on a system. Some jellyfin clients just don’t support the media format for direct pass through.

Looks amazing, but I really wanted amd so I could make a chimeraOS gaming console

Kingaroon K3PS, dip your toes in first a little.

I think the intention is for it to have deep grooves and lines like that to mimic a wood texture. But to us it just looks like big bad layer lines

I think you should talk to a professional. That’s what they’re there for.