Cannot get music to overlay on my videos. When I enter the MV section and I want to select a music from my phone, it does not allow me to record videos ?! Should the aac format be created at a certain bit rate? I converted many MP3 files to aac; But the application only allows the playback of its own files and I can not drop my selected file on the video from inside the phone. There is also a delay in sending the camera video. My drone is sg906 pro.