Reasoning
All three sources reference HD as the core video system for the iFlight Nazgul Evoque F5 V2 O4 6S; other entries mention alternate cameras (GoPro/DJI/Caddx Polar) or 4K options as compatibility or variant specifications, but no single source consistently uses a different canonical camera system. Therefore, HD best represents consensus and is the most common, unambiguous term across perspectives.