Extract Audio from MP4 video online

Here’s an easy hack to get the audio track from a MP4 video and to add it to any other video very easily. No need to be an expert video designer to use this trick.

1. Upload any video  (WebM, MKV, MP4 format) from your device that you want to add soundtrack   
2. If the video is short tick the loop attribute of the control video
3. Click once on upper right corner of the 011.video canvas. This trick will hide the next MP4 video
4. Upload the MP4 video audio source   
5. Your video will start automatically to record  with the audio track from the second MP4 video   
6. Let the audio play until the end and Download your video   

Here is video with audio track from a YouTube MP4 source made in few clicks with 011.video editor