Help with video.

It would depend on your computer platform and the destination. I would maybe start with the in-app tools that DJI has integrated in Go. That seems like the easiest way to start. I believe that you can edit the cached files then hook up to your UAV to download the full resolution video. This is commonly referred to as editing proxy files or offline editing. This saves computing power and creates your final master from the high quality material on your micro sd card.