after recording the nightly news off a ATSC3.0 station it will play back on my phone but the firestick just spins and never starts, I can record it fineon the ATSC 1.0 station but the signal is quite weak and it buffers constantly. I can also watch it live just fine thru the channels app.with the firestick.
Try changing decode hardware/software settings in the app on the fire stick
That did it. Thanx