I've got a 60 down/ 6 up connection for my Plex server.
I set the stream on Plex to 1.5Mbps which seems to give me at least a couple of solid simultaneous streams. It works fine for my friends in town.
Then I took my Roku out to the lake. Connected to my Plex server and tried to watch something. No luck with the Roku. Too glitchy, buffering, etc.
I thought my internet at the lake was to blame but I've got 5mbps which should be more than enough. It's a rural ISP using a microwave signal from a land based tower. It's not great but it does work. For example, Netflix works fine. Just not the Roku/Plex combo.
Any help or suggestions appreciated.