Hi,
I have a Diatone GT2 qaudcopter. (Diatone Crusader GT2 200 FPV Racing Drone /w F3 SP3 48CH VTX 30A BLHeli_S ESC HS1177 600TVL Cam PNP ). The video used to be fairly clean. But recently (maybe after some crashes), it became quite dirty. I don't remember seeing such distinct horizontal lines...