How to add a MP3 music background to a video ?
- As the video source was filmed on a smartphone change the screen size
- Upload the MP4 video
- Upload the MP3 music file Your video will start automatically to record
- Let the video play until the end and Download your video
Here is the video with a MP3 background music made with 011.video
Audio source : https://www.youtube.com/watch?v=Zcwp5v5KPrw
Video source : https://www.youtube.com/watch?v=n6ZGa2ofjSs