Nice.
Half way through the video, you say your reloading the flight plan and then you do another autonomous flight. I have only tried 1 autonomous flight so consider me to know very little on waypoint flying. Still trying to understand it better.
I thought that if a flight was finished or you physically switched from mission to some other mode, that the mission was complete or aborted and if you switched back to mission, it would start from the beginning of the mission and fly it.
Question is, what is the reason you reloaded the mission from your computer or tablet?
After powering down, does the last mission still reside in the Pixhawk?
One of my concerns when flying a mission, is what happens later that day or another day if you are in a new location, and you are ust manually flying around, but you mistakenly flip a switch to put in in mission mode, does it grab the last mission loaded and head out? I will probably reprogram my switches when not flying missions, so I can't do that. Just a big fear of mine since I don't know if old missions stay on the Pixhawk. Using 6 flight modes is just prone to more mistakes IMO, so I'm a bit concerned.
Ok, two parts. First, I am not 100% sure on what happens when you change modes. Does the mission restart from #1? I don't know. What I do when I want to restart a mission, is disarm, and rearm. That's what I did there. I didn't do anything on the laptop. I just shut down, disarmed in Stabilize mode, rearmed, flipped back to Auto, and go.
Part 2, does if later in the day, maybe at a different location, you flip to Auto, will it go? Absolutely. So you do have to be careful. I also treat the auto mode with a bit of caution. However, Rx failsafe will save you in this case, as long as you have it set up properly. If you have it set to RTL on Rx Failsafe, it will abort the mission and come back. However, if you have it set to "Continue in Auto" on Rx Failsafe, and you accidentally flip to Auto, and it remembers an old mission 50 miles away... you're screwed if you let it get out of range. So "Continue in Auto" needs to be used with EXTREME caution. I've only used it once or twice. I go in, use it, and get out, go back to RTL on Failsafe.
If, you screw up and it gets away from you, you have another option to save it (I believe...) if you still have a telemetry link. You should be able to change the mode to RTL from the ground control station.
You should ALWAYS be using a GCS with Arducopter IMO.