How to add an audio background into a video from a MP4 video source ?

1. Upload any video (WebM, MKV, MP4 format) from your device. If the video is short tick the loop attribute of the control video.

2. Click once on upper right corner of the 011.video canvas. This trick will hide the next MP4 video.

3. Upload the MP4 video audio source

4. Your video will start automatically to record with the audio track from the second MP4 video.

5. Let the audio play until the end and Download your video

Here is video result with audio track from a second MP4 video made in few clicks with 011.video web app :

How to add an audio background into a video from a MP4 video source ?

1. Upload any video (WebM, MKV, MP4 format) from your device. If the video is short tick the loop attribute of the control video.

2. Click once on upper right corner of the 011.video canvas. This trick will hide the next MP4 video.

3. Upload the MP4 video audio source

4. Your video will start automatically to record with the audio track from the second MP4 video.

5. Let the audio play until the end and Download your video

Here is video result with audio track from a second MP4 video made in few clicks with 011.video web app :

How to add a MP3 music background to a video ?

1. As the video source was filmed on a smartphone change the screen size 

2. Upload the MP4 video

3. Upload the MP3 music file Your video will start automatically to record

4. 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