do you at least understand what the settings are? for example
FPS - frames per second higher number = smoother video
FOV - field of view. higher fov = more curve / fisheye effect on video
so I used the GoPro app via wifi (which I never fly with the wifi on, but on the ground to change settings sure) to set the default power-up state to be video... as opposed to stills or timelapse.
I typically run in 1080p so that I can have Medium FOV (minimal curve) and 60fps because imo the movement looks really smooth in the recordings, better than the higher resolutions and lower fps.
2.7k I think also has a medium fov, granted it's a lower framerate but it still looks fine. I never run 4k because while the image quality is great, the super low framerate (again imo) yields jerky video when you're flying around in a Phantom.