How about a screen capture button on the pilot app to hit while flying

I guess you may know of az screen recorder - just in case :-) Not charged for, run in background - records screen and audio. That's4 android - it might be also for ios.
I know that's not your 'point' - just in case you didn't know and wish to capture. (akward, but power and vol pressed together on android, produces a screenshot.
Small tablet holder isn't it? Fragile and unstable too. Good flights.