I purchased my UN58TU7000 in March and have never been able to watch live streams, either live or after they finish, on Facebook if the video is in landscape mode. Oddly, live streams from the same Facebook channel in portrait mode work just fine. I end up streaming the video to my PC and connect it to the HDMI input on my TV to watch it live or later on after the live stream is finished. I am able to watch any video on Youtube regardless of format though I haven't tried to view a live stream there.
Any ideas on how to fix this? I'm tired of connecting my laptop to the HDMI port on the TV weekly to watch the live stream.