Original Post

I posted a while back about this and thought my problem was solved but it has returned.

I ONLY view on my local network.

I currently have Plex Media Server Running on both Synology (no docker) and Nvidia Shield because I was trying to see if either device performs better. Neither does.

Setup:

• Router: Address 192.168.25.1 Owned by ISP. No Admin Access. Can't use own router with my only available ISP.
• Nvidia Shield Android TV Pro
  • Ethernet connected directly to router (192.168.25.3)
  • Plex Client - Lots of buffering regardless of the server I choose. Often get a message that my network connection is not fast enough (sorry i dont have exact wording)
  • Plex Media Server
  • VLC -- Here I can see my library over DLNA and everything plays perfectly even the 2160 files that I rarely have.
• Synology DS418
  • ETH0 (192.168.25.6 static)
  • ETH1 (192.168.25.7 static)
  • Plex Media Server

As you can see from my previous post, I am using the following settings for Plex Media Server:

• Remote Access -- Disabled
• Network:
  • enable server suppport for IPv6 disabled
  • secure connections: Perferred
  • custom certificate: NULL
  • custom certificate encryption key: NULL
  • custom certificate domain: NULL
  • Preferred Netword interface ANY
  • Strict TLS configuration - disabled
  • Enable local network discovery (GDM) - enabled
  • Remote streams allowed per user - 2
  • LAN Networks - NULL
  • Terminate sessions paused for longer than 15 minutes
  • Treat WAN IP as LAN Bandwidth - disabled
  • Enable Relay - Disabled
  • Customer server access URLs - NULL
  • List of IP addresses and networks that are allowed without auth
    • 192.168.25.1/255.255.255.0
  • Webhooks - Disabled.
• Transcoder (I wonder if this has something to do with my problem) I don't care about transcoding if I don't absolutely need it. I am mostly watching videos in 1080p H.264 but I also have problems with smaller files like 720p files.
  • Transcoder quality - Automatic
  • Transcoder temporary directory - NULL
  • Transcoder default throttle buffer - 120
  • Background transcoding x264 preset - Ultra Fast
  • Enable HDR tone mapping - NULL
  • Disable video stream transcoding - Enabled
  • Maximum simultaneous video transcode - 1

Any help or suggestions would be greatly appreciated. There were a couple of different suggestion in the previous post but I still have problems with each of the suggestions.

Edited to add IP Address of Nvidia Shield