Remote Access only 720p

The connection is Indirect.

It is using Plex Relay, which is tunneled through a server at Plex and limited to 2 Mbps.

Remote Access is not working correctly on your server.

Double check your remote access configuration and follow the troubleshooting guides.

The Basics of Remote Access Troubleshooting

Plex DocumentationRemote Access and Granting Library Access
Remote Access
Troubleshooting Remote Access