Cellular 4G dongle 2

[GadgetGuy]

does 4K dongle use lower internet data if i fly in 1080 video settings vs 4K?

Unlikely to be significant because the selected video recording quality setting is being recorded directly to the drone microSD card, while the FPV video display setting on the device, which is transmitted by the 4G dongle to it, is not user configurable. However, try it and see! Note: turning off video cache won't help because that comes from the FPV video display, after it has already been received.