HELP! Low quality while on remote connection

Hi!

I am trying to get a server pc running at my parents home in order to use it as a library and be accessed by me and my friends, since they got more rooms in which to keep the loud old war machine. I would mostly stream 720/1080p movies, so bandwidth shouldn’t be a problem since we use 500Mbs internet (download and upload) and my tv has wired connection.

Before I do that, I started some inital testing using my personal pc as the server and connecting my TV on a remote connection using my phone as hotspot to simulate a worst case scenario. The problem is that in this conditions the streaming quality is utter garbage. I tried changing in app settings to use original quality but during stream it automatically detects 25.5Mbps and seems the setting did nothing. When I try automatic conversion I just get an infinite loading screen. I also tried using one of my friends’s PS5 who uses a 5Ghz wi-fi connection 1000Mbs, which I consider to be more than enough, but the result is the same.

I dont have this problem using wired/wi-fi same network though.

My question is: How do i overcome this? I wouldn’t mind waiting 30s-1m and get a good quality instead of 5s and a bad one.

I’ve been banging my head over this for the past 3 days with no avail and can’t find anything related to this problem. I am pretty sure I am doing something wrong but can’t figure it out.

Thanks! Here are some photo samples for refference
Imgur: The magic of the Internet - bad quality - Simulated remote connection
Imgur: The magic of the Internet - good quality - Same network

Let’s start with establishing what exactly is going on.

What information is showing in the “now playing” tile for that playback on the Plex server dashboard? We’re specifically looking if this stream is considered remote or indirect!
Exemplary screenshot from the "now playing" section
https://support.plex.tv/articles/200871837-status-and-dashboard/

If the stream is indirect / using a Plex relay, there’s probably some issue with your remote access setup.
Did you already have a look at the related troubleshooting support article?

https://support.plex.tv/articles/200931138-troubleshooting-remote-access/

There’s also a guide with some more details on how to troubleshoot remote access issues.

Hi! Thanks for the quick response.
Yes. You are correct, remote access was not working for me and i was using “relay”. I thought this wasn’t going to be a problem since I thought that this is only so I can access server settings from anywhere and the error wasn’t saying anything about Double-NAT.

I have finally managed to make it work properly. It seems that the problem was Double-NAT. My ISP was using CGNAT so I had to make a request to deactivate it.
All is working fine now. Thanks a lot!!!

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