I've been jealous of all the videos that have flight data/maps overlaid and couldn't figure out how to do it. It looks like recently Apple added the ability to record iPad/iPhone screens to quicktime. Maybe everyone else knows this, but I was not aware. I just tried it - works perfect!
More info here: http://www.techradar.com/us/news/software/how-to-record-your-iphone-or-ipad-screen-on-a-mac-1283217
More info here: http://www.techradar.com/us/news/software/how-to-record-your-iphone-or-ipad-screen-on-a-mac-1283217