You should have chosen a higher position.At least 10m above the surrounding area.A small hillock or hill with a bald peak. This way the wave propagation is much better. The remote control signal works better.
11,000 meters is the farthest I got, Ive tried a few times but the drone always wants to return back. I could push it but don't want to lose the drone. I use a 4 g network so range of the controller is not a problem. In the countryside it maybe a problem though.
Record from the controller, not the drone. Pull down from the top and select screen recorder. You can even plug in a USB Mic to get audio while you're recording.