Have been doing aerial photo and video for many years and one thing you must learn about aerial is first and foremost the machine needs to tuned like a sewing machine. In the video its all over the place and not very smooth. Second without the first one taking care of you will always fight with video, and three you never use auto-focus at all because that will always lead to focus being off most of the time and always doing the part you really wanted. In bright sun light you may get away with it some anything less and the odds go way down using auto-focus its the nature of the beast.