Hi Guys. I did my first "proper" flight today. Up round our local lighthouse and then along the North Norfolk coast. All went well but instead of one file with the entire flight it was split into four files! No two files are the same size. The record button was pressed at the start and end of the flight only. I now don't know how to stitch them together. I did try in the DJI app but it won't let me end up with a video of more than five minutes. Any advice will be gratefully received. Thank you. Mark.