Disabling transcoding does not force direct play / direct stream.
Disabling transcoding means Plex will refuse to stream the video if transcoding is required to do so.
Monitor playback via Plex Dashboard → Now Playing.
Is the connection shown as Indirect? If so, you are connecting via Plex Relay, which means your remote access is not working correctly. Plex Relay connections are tunneled through servers at Plex and are limited to 2 Mbps.
See Troubleshooting Remote Access and The Basics of Remote Access Troubleshooting .
Not necessary if remote access is working correctly.
