The recording is taken from a 1920x1080 screen.
Here is raw 4K recording as it comes from the radio:    • FPV on the verge with OpenIPC. 3840x2...  

Testing SSC338q + imx415 low latency(60ms) module capable of encoding 4K (3840x2160)/25fps or 1080p/120fps.
Changing video bitrate, resolution and MCS index in flight ( info at lower left corner).
Bad weather, wind gusts.
Sensor config needs tuning.