Hi Bill...thanks for the suggestion. And, thank you for suggesting this forum - it's great.Hi Fred, Kamloops welcomes you to the forum. Good to see you here! We met in Chase when I bought your iPad. I 3D printed a mount and put a anti-glare screen on it and it's working well with my mini.
I think @old man mavic answered your video question. Stop your recording before turning off the AC so the video file is properly finished. If you forget and shut down, the file will finish when you have the card in and start the AC up the next time, or start another video clip.
-Bill
Fred