I'm mostly very happy with my LG C4 as a home theatre centerpiece, and I did have it online so that I could use the apps for YouTube and Jellyfin. However, the lack of support for modern 4k rips (HEVC+DTS) ended up being a dealbreaker and I finally ditched the built in software for a fire stick instead.

No transcoding, no weird codec issues, just the raw files direct streamed from the underpowered Unraid box, into the back of the AVR where the audio is handled correctly and the video is sent to the screen.