So I am wanting to shoot some waterfalls and I finally have a working gimbal but I don't want drone buzzing in the video. How do you record and dub audio into the final video? . I have iMovie so I am sure I could do it with that but the only recording device I have is my DSLR. I could shot video with it and strip the audio and add it to my drone video unless there is an easier way. So any ideas or equipment that would be better?