Can you change the speed, height etc to US?  

You can set to feet in the settings.

Jump to about the 1 minute mark -

Hi there. It certainly allows you to change the units of the height, speed to US. First, open the DJI Fly App. Then enter "camera view", click on the three dots in the top right-hand corner of the screen. Finally, switch to the "Control" interface, you can alter the parameters units of the aircraft on it. If you have any further questions, please contact us anytime.