Reno....I have flashed this board more times than I care to count....I'm at my wits end and reached out to the supplier I bought it from in hopes they have some answers or send me a new one. I have flashed it, then flashed it with another firmware (say, ardurover) just to make sure the frimware takes and then flashed it back to ardocopter. I've tried the newest firmware, older firmware, calibrating it over and over again. Just today alone, I flashed it 3 different times and went through the entire calibration setup, including taking my whole quad apart into pieces and putting it all back together making sure I didn't have that one wrong connection that was throwing everything else off.....NADA! That video was the result and I can't think of anything else other than, the board is junk! Thank you for the advice though, I appreciate all the help I can get!I have no experience with APM or Ardupilot whatsoever, but it sure looks like your flight controller is just not doing it's job. Have you tried flashing the latest firmware and starting from scratch including all calibrations?