I have had various sticks and Roku highest end models and then got the latest ATV with hard wire port that adds Dolby vision and high frame rate HDR. I have a 2022 high-end TV.

The video quality is noticeably better. Not sure of older ATV, but this is clearly better than the top end Roku. Also, I’m not sure if it is the same on older tvs

The other thing is that you want to hard wire if at all possible. Even the best wifi can’t touch the reliability of a wire

Seems like your edge server is acting as a proxy for a media server on some other host on your LAN.

You want to make sure that the media server software is setup securely, patched, and properly isolated from anything else in LAN should that become compromised. Proxy closes off a lot of attack vectors but not application vulnerabilities. The Lastpass hack happened because of some vulnerability in an employees home plex server.