Really all you’re looking for is a message with an IP address in it. Open your Plex Media Server console (you can access from Settings of the web player or any other player) and then open Plex on the PS5.
A message similar to this one, pasted below.
Completed: [192.168.1.1:60710] 200 GET /photo/:/transcode?width=240&height=360&url=%2Flibrary%2Fmetadata%2F15418%2Fthumb%2F1615779198&minSize=1&upscale=1 (15 live) TLS GZIP 225ms 13911 bytes (pipelined: 4)
The key being that 192.168.1.1 is my router, and not my PS5.
Because the Plex Media Server is seeing my router IP, I believe what’s happening is the PS5 is making a connection with my local server outside of my local network. Because its making a connection outside my local network my streaming quality is at the mercy of whatever my upload speed is. I came to this conclusion based on a few things.
- Streaming anything from my NAS to my PS5 was using the Remote Quality settings. Switching that to Original allowed me to at least stream lower quality files without transcoding.
- @Moussa has previously posted that the PS5 requires a secure connection for all connections, and it’s possible to get just basic playback going they’ve got everyone connecting to their Plex Media Server using the relay system they have.
@tiagoduarte21 how do I open that screen? Interested to see what mine shows. Also wondering what the rest of that LAN string is.
Edit: Nevermind, got it. Mine does indeed show my WAN IP. And that was a simple fix, so there goes that theory 
