I have a Galaxy 10 and I am trying to mirror/cast to my Roku. It connects just fine. It shows my phone immediately. But when I play a video and turn my phone to landscape and error pops up. "NFL app videos cannot be cast to another screen. Please disconnect your smartphone to watch video". What is so bizarre is I am not trying to play any video off the NFL app. I have tried many different apps, and get same message.
Does anyone know if this is a Roku connections issue or a Samsung issue?
Any help would be greatly appreciated.
